All posts by smarc

electric_cars

J1772 Charge Protocol

http://www.fveaa.org/fb/J1772_386.pdf

OpenEVSE
Electric Vehicle Charging
J1772 / OpenEVSE
Electric Vehicle Charging
J1772 / OpenEVSE
Presented by:
Chris Howell
OpenEVSE
Topics:
• Electric Vehicle Supply Equipment
• J1772 Recommended Practice
• Challenges
• OpenEVSE
• Technology Development
OpenEVSE
Electric Vehicle Supply Equipment (EVSE)
The EVSE provides a safe connection from the
Electrical source to the Plug in Vehicle.
The EVSE provides several safety features:
• Power pins not hot until EVSE‐EV negotiation
• Ground Fault Circuit Interrupt (GFCI)
• Graceful start‐up/shut‐down
• Ground verification
• Pilot signal detection and verification
• Stuck Relay detection
• Plug rated for many plug‐in /disconnect cycles
*Not All EVSE implement every feature
OpenEVSE
J1772 is a SAE Recommended Practice for a electric vehicle conductive
charge system which covers:
• General physical
• Electrical
• Performance requirements
The intent is to define a common electric vehicle charging system
architecture including operational requirements and the functional and
dimensional requirements for the vehicle inlet and mating connector.
J1772 Overview
OpenEVSE
OpenEVSE
Charge Level Voltage Max Current
Level 1 (L1) 120VAC 16A ‐ 1.9kw
Level 2 (L2) 208 ‐ 240VAC 80A ‐ 20kw
DC Level 1 (L3) 200 – 500V DC 80A – 40kW
DC Level 2 (L3) 200 – 500V DC 200A ‐ 100kW
• Pilot Signal – 1khz pilot to communicate EVSE – EV state
• Duty Cycle – EVSE defines the maximum current available to the EV
• Proximity – Allows for graceful start‐up and shutdown of current flow
J1772 Properties
OpenEVSE
Charge Level Voltage Max Current
Level 1 (L1) 120VAC 16A ‐ 1.9kw
Level 1 Charging
• Adds < 5 Miles per every hour charging
• Best suited for Plug‐in‐Hybrid with low EV range
• Painfully slow for most BEVs
• Great in location where EVs park for several days at time and
high density is desired such as Airport
OpenEVSE
Charge Level Voltage Max Current
Level 2 (L2) 208 – 240VAC 80A ‐ 20kw
Level 2 Charging
• Adds up to 62 Miles range per hour of charge
• Rate Limited by on‐board charger of vehicle
• Slightly more costly than L1
• Great in location where Plug‐ins park. Home – Work –
Malls ‐ Attractions
OpenEVSE
Charge Level Voltage Max Current
Level 3 (DC‐FC) 300 – 460VDC 250A+
Level 3 Charging
• Adds up to 300 Miles range per hour of charge
• Much more costly than L1/L2
• Several competing standards (CHAdeMO, J1772, Tesla)
• Requires 3 Phase AC infrastructure
• Great in location between cities, near the highway and
where recharge speed is important
OpenEVSE
Charging Placement
• Charging Stations in prime locations
tend to be “ICE”d, locate close to
power but in less desirable parking
locations
• Charging speed should match time
at location, less time spent = quicker
chargers. Fast food – DCQC… Airport
long term L1
• Place EVSE between spaces so 1
EVSE can service 2 – 4 spaces each.
• Good Signage ‐ Reserved for plug‐in
OpenEVSE
State Pilot High Pilot Low Frequency EV Resistance Description
State A +12V N/A DC N/A Not Connected
State B +9V ‐12V 1000hz 2.74k EV Connected
(Ready)
State C +6V ‐12V 1000hz 882 EV Charge
State D +3V ‐12V 1000hz 246 EV Charge
Vent. Required
State E 0V 0V N/A Error
State F N/A ‐12V N/A Unknown/Error
The J1772 Pilot is a 1khz +12V to ‐12V square wave, the voltage
defines the state. The EV adds resistance pilot to Ground to vary the
voltage. The EVSE reads the voltage and changes state accordingly.
J1772 Pilot Signal
OpenEVSE
Amp Duty Cycle Amp Duty Cycle
6A 10% 40A 66%
12A 20% 48A 80%
18A 30% 65A 90%
24A 40% 75A 94%
30A 50% 80A 96%
The J1772 Pilot is a 1khz +12V to ‐12V square wave, the Duty cycle
(ratio high state to low state) determined the maximum available
current. The EVSE sets the duty cycle the EV must comply to original
setting or changes to the duty cycle.
J1772 Duty Cycle
6A ‐ 51A
Amps = Duty cycle x 0.6
Duty cycle = Amps / 0.6
51A ‐ 80A
Amps = (Duty Cycle ‐ 64) 2.5
Duty cycle = (Amps / 2.5) + 64
OpenEVSE
J1772 Negotiation
OpenEVSE
The J1772 Proximity circuit is present in the
Electric Vehicle and the J1772 plug. It uses a
voltage divider circuit with resistors in Parallel and
series to achieve different measured voltages for
each state.
J1772 Proximity
State Voltage on
Proximity pin
Not Connected 4.5v
Button Pressed 3.0v
Connected 1.5v
Resistance
R4 330
R5 2700
R6 150
R7 330
OpenEVSE
J1772 Proximity
State Voltage on
Proximity pin
Not Connected 4.5v
Voltage Divider
Resistance
R4 330
R5 2700
R6 150
R7 330
OpenEVSE
J1772 Proximity
State Voltage on
Proximity pin
Button Pressed 3.0v
Resistance Series Resistance Parallel
Voltage Divider
Resistance
R4 330
R5 2700
R6 150
R7 330
OpenEVSE
J1772 Proximity
State Voltage on
Proximity pin
Connected 1.5v
Resistance Series Resistance Parallel
Voltage Divider
Resistance
R4 330
R5 2700
R6 150
R7 330
OpenEVSE
J1772 Plug
OpenEVSE
J1772 Connector
OpenEVSE
Challenges
• Incompatibility of devices
• Missing safety features (Diode check, Vent required state)
• Poor quality of devices
• Overheating at or below rated current
• Cost of deployment
• Devices to bypass/circumvent/ignore J1772 NEC requirements
OpenEVSE
Home Built or Commercial Product???
Almost touching….
Hints:
• Device has cord but
no fuses
• Device uses wrong
type of relays (SSR not
Mechanical)
• Poor construction
• Metal Shavings
OpenEVSE
Hints:
• Open Source LINUX board
• Thermal issues at/below rated power
• Off the shelf power meter inside
• High percentage out of order, on the blink.
• Improper crimp on Power Connector
Home Built or Commercial Product???
OpenEVSE
Newer EVs capable of drawing higher
current are causing problems for even
UL listed commercial EVSEs running at
or below their rated limit.
• Honda first to implement cutoff in
the inlet
OpenEVSE
Don’t try this at home…
Ignoring J1772, NEC, Local code etc. can be
hazardous to people and property
The pictured solutions are work around to
bypass/trick J1772 protections
• No relay to remove power from connecter
• No GFCI protection
• Must be connected in certain order with
quick timing
• Causes vehicle error codes
• Could cause damage to charging system
OpenEVSE
Warnings
OpenEVSE hardware/firmware is intended for use for ENGINEERING
DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is
NOT considered to be a finished end‐product fit for general consumer use.
OpenEVSE
• Source materials (source code, schematics, recipes, documents) are
published and made available to the public
• Enables anyone to copy, modify and redistribute without paying royalties
or fees.
• Open‐source code can evolves through community cooperation
“Open Source”
OpenEVSE
OpenEVSE Source code is licensed open source under GNU GPLv3
Nobody should be restricted by the software they use. There are four
freedoms that every user should have:
• the freedom to use the software for any purpose,
• the freedom to change the software to suit your needs,
• the freedom to share the software with your friends and neighbors, and
• the freedom to share the changes you make.
http://www.gnu.org/licenses/gpl.html
GNU GPL v3
OpenEVSE
Creative Commons Attribution‐ShareAlike 3.0
All other OpenEVSE content licensed under CC BY SA 3.0
OpenEVSE
OpenEVSE is a Open Source Electric Vehicle J1772
Charging Station Controller
• Both Hardware and Firmware Open Source
• Fully supports SAE J1772 Recommended Practice
• Software adjustable pilot (6A – 80A)
• Built in GFCI with 20ma trip point
• Supports all J1772 states including “ventilation
required”
• Supports Diode check
• AC L1 – L2 auto detect Current setting for each
• Ground verification and Stuck Relay detection
OpenEVSE
OpenEVSE
February 13, 2011 ‐ Experiments with pilot began
June 15, 2011 – Nissan LEAF Delivered
July 1, 2011 – Successfully Charged LEAF
July 2011 – Joined forces with Lincomatic
October 2011 – Started OpenEVSE open sourced
hardware and firmware
December 2011 – First prototype OpenEVSE boards
available
OpenEVSE
OpenEVSE Plus
OpenEVSE Plus
• Board and Schematic Files Available
• Available in limited quantities as Kit or Built
• All surface mount component work complete
• Firmware pre‐loaded
• Tiny 2.2 x 1.75
• Power Supply Integrated
• Inexpensive ‐ $135 (kit) $155 (Built)
OpenEVSE
OpenEVSE LCD
OpenEVSE RGB LCD
• Board and Schematic Files Available
• Basic or with Real Time Clock (RTC)
• RTC adds EVSE based timer support
• Optional button adds LCD Menu Interface
• Available in limited quantities as Kit or Built
• All surface mount component work complete
• Basic $30 (kit) $40 (Built)
• RTC $40 (kit) $50 (Built)
OpenEVSE
OpenEVSE DIY
OpenEVSE DIY boards
• Board and Schematic Files Available
• Board available in OSHpark Store
• Source your own components
• Build yourself
• 3.4 x 2.5
• Inexpensive ‐ Board and PS ~ $100
OpenEVSE
Example EVSE built with OpenEVSE
• Diversified Stage Enclosure
• 30A ITT/Leviton J1772 Cable
• OpenEVSE Plus
• OpenEVSE RGB LCD with RTC
OpenEVSE
OpenEVSE is based on the ATMEL AVR:
• 8‐bit microprocessor
• 16mhz
• Compatible with Arduino IDE
OpenEVSE CPU
OpenEVSE
• The OpenEVSE pilot uses a 1w DC/DC converter to generate +12v and ‐12v.
• The Opamp takes the 1khz pilot from the microprocessor 0 – 5v and switched ‐
12v to +12v.
• The pilot is read by the microprocessor, R5 – R6 – R7 scale the ‐12v ‐ +12v signal
to 0 – 5v.
OpenEVSE Pilot
OpenEVSE
GFCI measures the difference of current going in vs. current going out. The circuit
“trips” if an imbalance of > 20ma. The trip point can be adjusted by modifying the
burden resistor R17 or the ratio of R14 – R15. The output of the fault line is
monitored by the microprocessor as an interrupt.
OpenEVSE GFCI
OpenEVSE
OpenEVSE uses 2 MID400 Optical Isolators to detect the presence of voltage on each
Hot line by sending a small current to ground. The AC_Test leads are connected after
the power relay to allow stuck relay detection as well as Ground Verification and
L1/L2 auto‐detection (1/3 Phase detection in Europe).
OpenEVSE Power
1 2
L L L2
L H L1
H L L1
H H Bad Ground
OpenEVSE
The relay circuit uses 2 2222 NPN transistors to switch 12V to the relay(s). Beginning
in 2.0B2 OpenEVSE supports both 1 DPST or 2 SPST. Using 2 relays allows the self tests
to be run one leg at a time avoiding powering the J1772 handle during the test. Also
power can be removed from 1 leg if there is a stuck relay condition.
OpenEVSE Relay
OpenEVSE
Coming Soon (hopefully) / Areas you can contribute
• Simple Communications Protocol
• Android App
• Raspberry Pi integration
• Wi‐Fi support
• Vehicle info to EVSE ‐ CAN / WiFi
• LCD touch screen
• Energy Monitoring
• General code clean up
• RTC / Timer code library
OpenEVSE
Simple Communications protocol
• Work in conjunction with existing Command Line Interface
• Work in progress / High Priority
https://docs.google.com/document/d/1e00CnEpSUb6BpQho9srvDj8HuKcuV
MxiXaSICXDvHeA/edit?usp=sharing
• EVSE Status and Control
• Energy Monitoring input
• Data from EV via CAN or WiFi (TESLA REST API)
• Needed for Android App, LCD touchscreen / Raspberry pi
• UART / I2C ‐ Wifi / Bluetooth
OpenEVSE
L1 and L2 EVSEs are currently dumb devices
• No ‐ 2 way data communication between EV and EVSE
• Data can be provided to EVSE via
• CAN bus
• Wifi/3G/4G
• Bluetooth
• EV – EVSE communication allows
EVSE to know and act on:
• State of Charge
• Battery Voltage
• Current
OpenEVSE
Android App
• Tablet/Phone
• Touchscreen for EVSE
• Fusion EVSE and EV info/control
• Serial SPP or WiFi
OpenEVSE
Raspberry Pi
• Inexpensive method to add Ethernet /
Wi‐Fi etc.
• Web front end to EVSE
• Fusion EVSE and EV info/control
• TTL Serial or I2C
• Headless or LCD Touchscreen
OpenEVSE
WiFi
• Telnet/SSH access to SerialCLI (Done)
• Web client – provide input to webserver
• Fusion EVSE and EV info/control
• TTL Serial
• Con – twice as expensive as adding Raspberry pi
OpenEVSE
Simple LCD touchscreen
• Arduino Touch Screens
• 4D Systems
• Fusion EVSE and EV info/control
• TTL Serial or I2C
OpenEVSE
Energy Monitoring
• Based on Open Energy Monitor
• Reads both Voltage and Current
• May not be necessary if data can be obtained from
EV
• TTL Serial or I2C
OpenEVSE
Modifications to J1772 inlet and/or handle can provide
information to the EV/EVSE to act on over temp conditions and
reduce current or terminate charge.
OpenEVSE
Infrastructure is expensive, Smart EVSEs could
share a circuit and share load.
• J1772 allows for dynamic current settings
• Vehicles with low current requirement of
those finished can give capacity to those
who need it
Example: 8 ‐ 30A EVSE
1 30A 5 16A
2 30A 6 13A
3 26A 7 11A
4 20A 8 10A
OpenEVSE
Resources:
Main Project Page:
http://www.openevse.com
http://code.google.com/p/open‐evse/
Discussion
https://groups.google.com/forum/?fromgroups#!forum/OpenEVSE
http://www.mynissanleaf.com/viewtopic.php?f=26&t=6546
Development Code
https://github.com/lincomatic/open_evse
OpenEVSE
Questions??? / Demos…

Linux, sysadmin

Nvidia Drivers on Linux Mint

If drivers fail to load at boot

Your machine boots up with a low-resolution screen, and and after logging in you see an error message to the effect  of “Your system is currently running without video acceleration. You may experience poor performance and high CPU usage“.

There should also be a button to launch the driver manager.

If you’re unable to change things via the driver manager:

From a shell: edit /etc/modules

Make sure the following three lines are there – if not, add them to the bottom of the file:

nvidia
nvidia-drm
nvidia-modeset

Then reboot.

If that doesn’t work, you can see what the system uses with
ubuntu-devices list

You can use ubuntu-devices autoinstall which should do the job.
Reboot when complete.

Or you can install a specific driver version with

apt install nvidia-driver-470 (or what ever version you need). You can use ubuntu-devices list to see available choices. Reboot when complete.

To remove the driver and its associated dependencies, use apt.
Ex.
sudo apt remove nvidia-driver-470
sudo apt autoremove
Then reboot. It should then use the open-source nouveau driver.

You can install the open-source driver to revert to the open-source driver:

sudo apt install xserver-xorg-video-nouveau
Then reboot

arduino, ESP32, microcontrollers

ESP8266 – AT Command Reference · room-15

ESP8266 – AT Command Reference

ESP8266, in it’s default configuration, boots up into the serial modem mode. In this mode you can communicate with it using a set of AT commands.  AT commands that ESP8266 supports, explain what they do and how to use them.

Historically AT commands are based on the Hayes Command Set and these are no different.

AT Commands

Index of all known AT commands

Basic WiFI layer TCPIP Layer
AT AT+CWMODE AT+CIPSTATUS
AT+RST AT+CWJAP AT+CIPSTART
AT+GMR AT+CWLAP AT+CIPSEND
AT+GSLP AT+CWQAP AT+CIPCLOSE
ATE AT+CWSAP AT+CIFSR
AT+CWLIF AT+CIPMUX
AT+CWDHCP AT+CIPSERVER
AT+CIPSTAMAC AT+CIPMODE
AT+CIPAPMAC AT+CIPSTO
AT+CIPSTA AT+CIUPDATE
AT+CIPAP +IPD

Line termination

ESP8266 expects <CR><LF> or CarriageReturn and LineFeed at the end of each command, but just<CR> seems to work too.

Command variants

Each command can have up to 4 variants changing the function of it. You can chose between them by appending one of four possible values to the end of the root command itself. These four appendices can have the following values "",=<parameter|[parameters]>,"?",=?

Type Example Description
Test AT+CIPSTART=? Query the range of values (So far only AT+CWMODE=? uses it)
Query AT+CMD? Returns the current value of the parameter.
Set AT+CMD=Parameter Set the value of user-defined parameters in commands and run.
Execute AT+CMD Runs commands with no user-defined parameters.
Note:
  • Not all AT commands support all 4 variants.
  • [] = default value, not required or may not appear.
  • String values require double quotation marks, for example: AT+CWSAP="ESP756190","21030826",1,4.
  • Baud rate = 115200
  • AT instruction ends with “\r\n”

Commands

AT – Test AT startup

Variant Command Response Function
Execute AT OK Test if AT system works correctly

Back to Index

AT+RST – Restart module

Variant Command Response Function
Execute AT+RST OK Reset the module

ESP-01 Output after reset:

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x40100000, len 24444, room 16
tail 12
chksum 0xe0
ho 0 tail 12 room 4
load 0x3ffe8000, len 3168, room 12
tail 4
chksum 0x93
load 0x3ffe8c60, len 4956, room 4
tail 8
chksum 0xbd
csum 0xbd

ready

ESP-12 Output after reset:

\0x04B1\0x85 \0xff\0x13:'\0xe0;\0xcc;!G\0xfa\0x11\0xa9R\0xc6\0x83\0x01\0xd9\0x81
[Vendor:www.ai-thinker.com Version:0.9.2.4]

ready

Back to Index

AT+GMR – View version info

Variant Command Response Function
Execute AT+GMR version, OK Print firmware version
Parameters:
  • version: firmware version number
ESP-01 output:
00160901
ESP-12 output:
0018000902-AI03

Back to Index

AT+GSLP – Enter deep-sleep mode

Variant Command Response Function
set AT+GSLP=time time OK Enter deep sleep mode for time milliseconds
parameters:
  • time: Time to sleep in milliseconds
Example：

AT+GSLP=1500

Note:

Hardware has to support deep-sleep wake up (Reset pin has to be High).

Back to Index

ATE – Enable / Disable echo

Variant Command Response Function
Execute ATE0 OK Disable echo (Doesn’t send back received command)
Execute ATE1 OK Enable echo (Sends back received command before response)
Note:

I haven’t had any luck with this command yet. Both ATE0 and ATE1 return no this fun.
ATE returns OK
This changed with ESP-12 where the command functions exactly as expected!

Back to Index

AT+CWMODE – WIFI mode（station, AP, station + AP）

Variant Command Response Function
Test AT+CWMODE=? +CWMODE:(1-3) OK List valid modes
Query AT+CWMODE? +CWMODE:mode OK Query AP’s info which is connect by ESP8266.
Execute AT+CWMODE=mode OK Set AP’s info which will be connect by ESP8266.
Parameters:
  • mode： An integer designating the mode of operation either 1, 2, or 3.
    1 = Station mode (client)
    2 = AP mode (host)
    3 = AP + Station mode (Yes, ESP8266 has a dual mode!)
Notes:

ESP-12 came configured as host with ssid set to ESP_A0A3F2, no password, channel 1 You can use AT+CWSAP? to find the current settings.

Back to Index

AT+CWJAP – Connect to AP

Variant Command Response Function
Query AT+CWJAP? + CWJAP:ssid OK Prints the SSID of Access Point ESP8266 is connected to.
Execute AT+CWJAP=ssid,pwd OK Commands ESP8266 to connect a SSID with supplied password.
Parameters:
  • ssid：String, AP’s SSID
  • pwd：String, not longer than 64 characters
Example：
AT+CWJAP="my-test-wifi","1234test"
Example AT+CWJAP?：
+CWJAP:"my-test-wifi"

Back to Index

AT+CWLAP – Lists available APs

Variant Command Response Function
Set AT+CWLAP=ssid,mac,ch +CWLAP:ecn,ssid,rssi,mac OK Search available APs with specific conditions.
Execute AT+CWLAP AT+CWLAP:ecn,ssid,rssi,mac OK Lists available Access Points.
Parameters:
  • ecn:
    • 0 = OPEN
    • 1 = WEP
    • 2 = WPA_PSK
    • 3 = WPA2_PSK
    • 4 = WPA_WPA2_PSK
  • ssid: String, SSID of AP
  • rssi: signal strength
  • mac: String, MAC address
Note:

On ESP-01 I have had no luck with the set version of this command (AT+CWLAP=...). If you know what it does please let me know.
On ESP-12, the Set version of the command allows to see if a certain SSID, with certain MAC on certain channel exists. If it doesit is returned as one line of the Execute version of this command.

Example AT+CWLAP:
+CWLAP:(3,"CVBJB",-71,"f8:e4:fb:5b:a9:5a",1)
+CWLAP:(3,"HT_00d02d638ac3",-90,"04:f0:21:0f:1f:61",1)
+CWLAP:(3,"CLDRM",-69,"22:c9:d0:1a:f6:54",1)
+CWLAP:(2,"AllSaints",-88,"c4:01:7c:3b:08:48",1)
+CWLAP:(0,"AllSaints-Guest",-83,"c4:01:7c:7b:08:48",1)
+CWLAP:(0,"AllSaints-Guest",-83,"c4:01:7c:7b:05:08",6)
+CWLAP:(4,"C7FU24",-27,"e8:94:f6:90:f9:d7",6)
+CWLAP:(2,"AllSaints",-82,"c4:01:7c:3b:05:08",6)
+CWLAP:(3,"QGJTL",-87,"f8:e4:fb:b5:6b:b4",6)
+CWLAP:(4,"50EFA8",-78,"74:44:01:50:ef:a7",6)
+CWLAP:(0,"optimumwifi",-78,"76:44:01:50:ef:a8",6)
+CWLAP:(3,"BHQH4",-95,"18:1b:eb:1a:af:5b",6)
+CWLAP:(3,"NETGEAR49",-86,"84:1b:5e:e0:28:03",7)
+CWLAP:(3,"ngHub_319332NW00047",-56,"20:e5:2a:79:b1:2f",11)
+CWLAP:(3,"BFZR4",-73,"18:1b:eb:1d:c3:91",11)
+CWLAP:(1,"5FFVL",-82,"00:26:b8:b5:c0:f2",11)
+CWLAP:(3,"59G6D",-77,"00:7f:28:6d:91:7b",11)
+CWLAP:(3,"N16FU",-53,"20:cf:30:ce:60:fe",11)
+CWLAP:(3,"ITS",-82,"90:72:40:21:5f:76",11)
+CWLAP:(3,"ITS",-79,"24:a2:e1:f0:04:e4",11)
Example AT+CWLAP="N16FU","20:cf:30:ce:60:fe",11:
+CWLAP:(3,"N16FU",-53,"20:cf:30:ce:60:fe",11)

Back to Index

AT+CWQAP – Disconnect from AP

Variant Command Response Function
Execute AT+CWQAP OK Disconnect ESP8266 from the AP is currently connected to.
Note:

After running this command, if you run AT+CWJAP? it still shows the AP you were connected to before. Back to Index

AT+CWSAP – Configuration of softAP mode

Variant Command Response Function
Query AT+CWSAP? +CWSAP:ssid,pwd,ch,ecn OK Query configuration of ESP8266 softAP mode.
Set AT+CWSAP=ssid,pwd,ch,ecn OK Set configuration of softAP mode.
Parameters:
  • ssid: String, ESP8266’s softAP SSID
  • pwd: String, Password, no longer than 64 characters
  • ch: channel id
  • ecn:
    • 0 = OPEN
    • 2 = WPA_PSK
    • 3 = WPA2_PSK
    • 4 = WPA_WPA2_PSK

Example
AT+CWSAP="esp_123","1234test",5,3
AT+CWSAP? => +CWSAP:"esp_123","1234test",5,3

Back to Index

AT+CWLIF – List clients connected to ESP8266 softAP

Variant Command Response Function
Execute AT+CWLIF [ip,other] OK List information on of connected clients.
Parameters:

ip: IP address of a client connected to the ESP8266 softAP other: Other info, look at example. I don’t know what it means yet.

Example (ESP-01):
AT+CWLIF

192.168.4.100,3fff50b4:3fff50ba:3fff50c0:3fff50c6:3fff50cc:3fff50d2

OK
Example (ESP-12):
AT+CWLIF

192.168.4.100,c0:ee:fb:25:33:ec

OK

I ran the command after connecting to the ESP8266 with my cellphone.

Back to Index

AT+CWDHCP – Enable/Disable DHCP

Variant Command Response Function
Set AT+CWDHCP=mode,en OK Enable or disable DHCP for selected mode
Parameters:
  • mode:
    • 0 : set ESP8266 as a softAP
    • 1 : set ESP8266 as a station
    • 2 : set both ESP8266 to both softAP and a station
  • en:
    • 0 : Enable DHCP
    • 1 : Disable DHCP
Note:

This command doesn’t seem to work on firmware 00160901 (ESP-01) nor 0018000902-AI03 (ESP-12).

Back to Index

AT+CIPSTAMAC – Set MAC address of ESP8266 station

Variant Command Response Function
Query AT+CIPSTAMAC? +CIPSTAMAC:mac OK Print current MAC ESP8266’s address.
Execute AT+CIPSTAMAC=mac OK Set ESP8266’s MAC address.
Parameters:
  • mac： String, MAC address of the ESP8266 station.
Example:

AT+CIPSTAMAC="18:aa:35:97:d4:7b"

Note:

This command doesn’t seem to work on firmware 00160901

Back to Index

AT+CIPAPMAC – Set MAC address of ESP8266 softAP

Variant Command Response Function
Query AT+CIPAPMAC? +CIPAPMAC:mac OK Get MAC address of ESP8266 softAP.
Execute AT+CIPAPMAC=mac OK Set mac of ESP8266 softAP.
Parameters:
  • mac： String, MAC address of the ESP8266 softAP.
Example:

AT+CIPAPMAC=”2c:aa:35:97:d4:7b”

Note:

This command doesn’t seem to work on firmware 00160901

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AT+CIPSTA – Set IP address of ESP8266 station

Variant Command Response Function
Query AT+CIPSTA? +CIPSTA:ip OK Get IP address of ESP8266 station.
Execute AT+CIPSTA=ip OK Set ip addr of ESP8266 station.
Parameters:
  • ip： String, ip address of the ESP8266 station.
Example:

AT+CIPSTA=”192.168.101.108”

Note:

This command doesn’t seem to work on firmware 00160901

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AT+CIPAP – Set ip address of ESP8266 softAP

Variant Command Response Function
Query AT+CIPAP? +CIPAP:ip OK Get ip address of ESP8266 softAP.
Execute AT+CIPAP=ip OK Set ip addr of ESP8266 softAP.
Parameters:
  • ip： String, ip address of ESP8266 softAP.
Example:
AT+CIPAP="192.168.5.1"
Note:

This command doesn’t seem to work on firmware 00160901

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AT+CIPSTATUS – Information about connection

Variant Command Response Function
Test AT+CIPSTATUS=? OK
Execute AT+CIPSTATUS STATUS:status +CIPSTATUS:id,type,addr,port,tetype OK Get information about connection.
Parameters:
  • status：
    • 2: Got IP
    • 3: Connected
    • 4: Disconnected
  • id： id of the connection (0~4), for multi-connect
  • type： String, “TCP” or “UDP”
  • addr： String, IP address.
  • port： port number
  • tetype：
    • 0 = ESP8266 runs as a client
    • 1 = ESP8266 runs as a server
Note:

On ESP-01 this command returns STATUS:1 instead (no extra info, but status changes) On 0018000902-AI03 this command returns STATUS:2 instead (no extra info, but status changes)

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AT+CIPSTART – Establish TCP connection or register UDP port and start a connection

Variant Command Response Function
Set AT+CIPSTART=type,addr,port OK Start a connection as client. (Single connection mode)
Set AT+CIPSTART=id,type,addr,port OK Start a connection as client. (Multiple connection mode)
Test AT+CIPSTART=? [+CIPSTART:(id)(“type”),(“ip address”),(port)] OK List possible command variations)
Parameters:
  • id: 0-4, id of connection
  • type: String, “TCP” or “UDP”
  • addr: String, remote IP
  • port: String, remote port

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AT+CIPSEND – Send data

Variant Command Response Function
Test AT+CIPSEND=? OK
Set AT+CIPSEND=length SEND OK Set length of the data that will be sent. For normal send (single connection).
Set AT+CIPSEND=id,length SEND OK Set length of the data that will be sent. For normal send (multiple connection).
Execute AT+CIPSEND Send data. For unvarnished transmission mode.

Normal Mode

Parameters:
  • id: ID no. of transmit connection
  • length: data length, MAX 2048 bytes

Unvarnished Transmission Mode

Wrap return “>” after execute command. Enters unvarnished transmission, 20ms interval between each packet, maximum 2048 bytes per packet. When single packet containing “+++” is received, it returns to command mode.

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AT+CIPCLOSE – Close TCP or UDP connection

Variant Command Response Function
Test AT+CIPCLOSE=? OK
Set AT+CIPCLOSE=id OK Close TCP or UDP connection.For multiply connection mode
Execute AT+CIPCLOSE OK Close TCP or UDP connection.For single connection mode
Parameters:
  • id： ID no. of connection to close, when id=5, all connections will be closed.
Note:

In server mode, id = 5 has no effect!

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AT+CIFSR – Get local IP address

Variant Command Response Function
Test AT+CIFSR=? OK
Execute AT+CIFSR +CIFSR:ip OK Get local IP address.
Parameters:
  • ip: IP address of the ESP8266 as an client.
Example AT+CIFSR:
10.101.10.134

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AT+CIPMUX – Enable multiple connections or not

Variant Command Response Function
Set AT+CIPMUX=mode OK Enable / disable multiplex mode (up to 4 conenctions)
Query AT+CIPMUX? +CIPMUX:mode OK Print current multiplex mode.
Parameters:
  • mode:
    • 0: Single connection
    • 1: Multiple connections (MAX 4)
NOTE:

This mode can only be changed after all connections are disconnected. If server is started, reboot is required.

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AT+CIPSERVER – Configure as server

Variant Command Response Function
Set AT+CIPSERVER=mode[,port] OK Configure ESP8266 as server
Parameters:
  • mode:
  • 0: Delete server (need to follow by restart)
  • 1: Create server
  • port: port number, default is 333
NOTE:
  1. Server can only be created when AT+CIPMUX=1
  2. Server monitor will automatically be created when Server is created.
  3. When a client is connected to the server, it will take up one connection，be gave an id.

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AT+CIPMODE – Set transfer mode

Variant Command Response Function
Query AT+CIPMODE? +CIPMODE:mode OK Set transfer mode,normal or transparent transmission.
Set AT+CIPMODE=mode OK Set transfer mode,normal or transparent transmission.
Parameters:
  • mode:
  • 0: normal mode
  • 1: unvarnished transmission mode

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AT+CIPSTO – Set server timeout

Variant Command Response Function
Query AT+CIPSTO? +CIPSTO:time Query server timeout.
Set AT+CIPSTO=time OK Set server timeout.
Parameters:
  • time: server timeout, range 0~7200 seconds

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AT+CIUPDATE – update through network

!!! Don’t run this unless you know what you’re doing !!!

!!! It will likely brick your device !!!

Attempts to self-update from the internet.

Variant Command Response Function
Execute AT+CIUPDATE +CIPUPDATE:n OK Start update through network
Parameters:

–n:

  • 1: found server
  • 2: connect server
  • 3: got edition
  • 4: start update
Example:
AT+CIUPDATE

+CIUPDATE: 1
+CIUPDATE: 2
+CIUPDATE: 3
+CIUPDATE: 4

\0x02\0x8cl\0x8el\0x8e\0x1cp\0x0c\0x8c\0xf2nn\0xee\0x00l\0x8c\0x8el`
\0x02\0x90\0x12\0x12nnl\0x8cl`\0x02\0x0e\0x02nr\0x8e\0x92\0x92n\0x0c\0x0c
\0x02\0x8c\0x92`\0x02`
\0xf2n\0x0c\0x0c\0x0c\0x9e\0xe0b\0x82nl\0x8c\0x0c\0x8c
\0xf2nn\0xee\0x00\0x0c\0x8e\0x0elp\0xf2n\0xe0\0x10\0x02\0x0c
\0x0cr\0x8c\0x9c\0x9c\0xe2\0xe0\0x0c\0x0c\0x0c
\0x0cb\0x0cn\0xe2|\0x02\0xec\0xecl\0x8c\0x0cb\0x8c\0xf2nn
...forever

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+IPD – Receive network data

Variant Command Response Function
Execute +IPD,len:data Receive network data from single connection.
Execute +IPD,id,len:data Receive network data from multiple connection.
Parameters:
  • id: id no. of connection
  • len: data length
  • data: data received
Note:

I have had no luck with this command so far.

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Sources

esp8266 GitHub Wiki

Source: ESP8266 – AT Command Reference · room-15

3dprinting, cad, fusion360

Orbit/Pan Settings in Fusion 360

Fusion 360

  • Zoom: roll the middle mouse button or Ctrl + Shift + middle mouse button
  • Pan: middle mouse button
  • Orbit: Shift + middle mouse button

Alias

  • Zoom: Shift + Alt + right mouse button
  • Pan: Shift + Alt + middle mouse button
  • Orbit: Shift + Alt + left mouse button

Inventor (Windows only)

  • Zoom: F3 + left mouse button
  • Pan: F2 + left mouse button
  • Orbit: F4 + left mouse button

SolidWorks

  • Zoom: Shift + roll middle mouse button
  • Pan: Ctrl + middle mouse button (Windows) or Command + middle mouse button (Mac)
  • Orbit: Middle mouse button

Tinkercad

  • Zoom: roll the middle mouse button or Ctrl + Shift + middle mouse button
  • Pan: middle mouse button
  • Orbit: right mouse button

Source: Tech Tip: How to Quickly Customize Orbit/Pan Settings in Fusion 360 – Fusion 360 Blog

microsoft, MicrosoftSucksAss, Windows

How to Install Windows 11 Home With a Local Account – ExtremeTech

When you see the “Let’s connect you to a network” screen, hit Shift-F10, type “taskmgr” in the command prompt window, and kill the process called “Network connection flow.” According to the video, this will allow the OS to install normally after you insert a user login and password. You can also kill the application directly from the command line if you like, using the command “taskkill /F /IM oobenetworkconnectionflow.exe”

Source: How to Install Windows 11 Home With a Local Account – ExtremeTech