Difference between revisions of "NodeMCU Amica"
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| − | The [[nodeMCU Amica]] is a small module, which hosts an [[ESP8266]] SOC (system-on-chip) on an [[ESP-12]] module. The [[nodeMCU Amica | Amica]] module has also a [[CP1202]] USB-UART adapter on board, so that it is easy to communicate to the [[ESP8266]] chip though the MicroUSB connector. | + | The [[nodeMCU Amica]] is a small module, which hosts an [[ESP8266]] SOC (system-on-chip) on an [[ESP8266#E-12 | ESP E-12]] module. The [[nodeMCU Amica | Amica]] module has also a [[CP1202]] USB-UART adapter on board, so that it is easy to communicate to the [[ESP8266]] chip though the MicroUSB connector. |
=== Communication === | === Communication === | ||
Revision as of 16:49, 16 July 2016
The nodeMCU Amica is a small module, which hosts an ESP8266 SOC (system-on-chip) on an ESP E-12 module. The Amica module has also a CP1202 USB-UART adapter on board, so that it is easy to communicate to the ESP8266 chip though the MicroUSB connector.
Communication
The modules come configured with one or various firmwares:
- Ai-Thinker (AT)
- With this firmware, the module listens at a baud rate of 115200 bps (or older ones at 57600 bps) for commands in the shape of
AT+...to establish WiFi, IP and TCP connections. - Example: (User input in bold.)
Ai-Thinker Technology Co.,Ltd. ready AT+CWMODE=1 OK AT+CWJAP="CommonsLab","12345678" WIFI CONNECTED WIFI GOT IP OK AT+CIFSR +CIFSR:STAIP,"10.176.30.89" +CIFSR:STAMAC,"18:fe:34:e2:0e:85" OK
- nodeMCU
- With this firmware, the module listens at a baud rate of 9600 bps for commands in the Lua programming language.
- Example: (User input in bold.)
NodeMCU 0.9.6 build 20150704 powered by Lua 5.1.4
> wifi.setmode(wifi.STATION)
> wifi.sta.config("TEST-AP","12345678")
> wifi.sta.connect()
> print(wifi.sta.getip())
10.176.30.118 255.255.255.192 10.176.30.65
Changing the Firmware
The module can be changed from the [http:// AT (Ai-Thinker) firmware] to the nodeMCU firmware and back or even to other firmware written in C with, for example, the Arduino IDE. To write new firmware into the flash memory of the module, the Python script espTool can be used:
python esptool.py --port /dev/ttyUSB0 write_flash 0x00000 /Path/To/The/Firmware.bin
You might have to change /dev/ttyUSB0 to /dev/ttyUSB1 or similar.
List of AT commands
(Based on info from ElectroDragon.)
- Baud rate at 57600, 115200 (new line) use option "send new line" or 'carriage return' for each command
- <x> is the command
| Set | Inquiry | Test | Execute | |
|---|---|---|---|---|
| Syntax: | AT+<x>=<…> | AT+<x>? | AT+<x>=? | AT+<x> |
| Example: | AT+CWMODE=1 | AT+CWMODE? | AT+CWMODE=? | - |
| Explanation: | Set the WiFi mode to Client | Check current mode | Return which modes supported | - |
| Command | Description | Type | Set/Execute | Inquiry | test | Parameters and Examples | |
|---|---|---|---|---|---|---|---|
| AT | general test | basic | - | - | - | - | |
| AT+RST | restart the module | basic | - | - | - | There must be no white space! | |
| AT+GMR | check firmware version | basic | - | - | - | - | |
| AT+CWMODE | wifi mode | wifi | AT+CWMODE=<mode> | AT+CWMODE? | AT+CWMODE=? | 1= Sta, 2= AP, 3=both, Sta is the default mode of router, AP is a normal mode for devices | |
| AT+CWJAP | join the AP | wifi | AT+CWJAP =<ssid>,< pwd > | AT+CWJAP? | - | ssid = ssid, pwd = wifi password | |
| AT+CWLAP | list the AP | wifi | AT+CWLAP | ||||
| AT+CWQAP | quit the AP | wifi | AT+CWQAP | - | AT+CWQAP=? | ||
| AT+CWSAP | set the parameters of AP | wifi | AT+CWSAP= <ssid>,<pwd>,<chl>, <ecn> | AT+ CWSAP? | ssid, pwd, chl = channel, ecn = encryption; eg. Connect to a WiFi Access-Point: AT+CWJAP="TEST-AP","12345678"; and then check if you are connected: AT+CWJAP? | ||
| AT+CWLIF | check join devices' IP | wifi | AT+CWLIF | - | - | ||
| AT+CIPSTATUS | get the connection status | TCP/IP | AT+CIPSTATUS | <id>,<type>,<addr>,<port>,<tetype>= client or server mode | |||
| AT+CIPSTART | set up TCP or UDP connection | TCP/IP | 1: single connection (+CIPMUX=0) AT+CIPSTART= <type>,<addr>,<port>; 2: multiple connection (+CIPMUX=1) AT+CIPSTART= <id><type>,<addr>, <port> | - | AT+CIPSTART=? | id = 0-4, type = TCP/UDP, addr = IP address, port= port; eg. Connect to another TCP server, set multiple connection first: AT+CIPMUX=1; connect: AT+CIPSTART=4,"TCP","X1.X2.X3.X4",9999 | |
| AT+CIPMODE | set data transmission mode | TCP/IP | AT+CIPMODE=<mode> | AT+CIPSEND? | 0: non-data mode, 1: data mode | ||
| AT+CIPSEND | send data | TCP/IP | 1: single connection(+CIPMUX=0) AT+CIPSEND=<length>; 2: multiple connection (+CIPMUX=1) AT+CIPSEND= <id>,<length> | AT+CIPSEND=? | eg. send data: AT+CIPSEND=4,15 and then enter the data. | ||
| AT+CIPCLOSE | close TCP or UDP connection | TCP/IP | AT+CIPCLOSE=<id> or AT+CIPCLOSE | AT+CIPCLOSE=? | |||
| AT+CIFSR | Get IP address | TCP/IP | AT+CIFSR | AT+ CIFSR=? | |||
| AT+CIPMUX | set multiple connections | TCP/IP | AT+CIPMUX=<mode> | AT+CIPMUX? | 0 for single connection 1 for multiple connections | ||
| AT+CIPSERVER | set as server | TCP/IP | AT+CIPSERVER= <mode>[,<port> ] | mode 0 to close server mode, mode 1 to open; port = port; eg. turn on as a TCP server: AT+CIPSERVER=1,8888, check the self server IP address: AT+CIFSR=? | |||
| AT+CIPSTO | Set the server timeout | TPC/IP | AT+CIPSTO= | AT+CIPSTO? | |||
| +IPD | received data | For Single Connection mode(CIPMUX=0): + IPD, <len>: For Multi Connection mode(CIPMUX=1): + IPD, <id>, <len>: |