Exercising ESP8266 module serial communications with python
I'm using an ESP8266 ESP-01 module with default firmware as detailed in the ESP8266/SerialTest project.
This is a test of driving it with a simple python script espy.py
$ ./espy.py Usage: espy.py <serial_port>[:baud_rate] <command> [<args>] Commands: status reset join <ssid><password> leaveif possible it will return software details, access point and IP address..
$ ./espy.py /dev/tty.wchusbserial2420:115200 status AT OK AT+GMR AT version:0.40.0.0(Aug 8 2015 14:45:58) SDK version:1.3.0 Ai-Thinker Technology Co.,Ltd. Build:1.3.0.2 Sep 11 2015 11:48:04 OK AT+CWMODE? +CWMODE:2 OK AT+CWJAP? No AP OK AT+CIFSR +CIFSR:APIP,"192.168.4.1" +CIFSR:APMAC,"5e:cf:7f:8b:56:e1" OK
Reset the ESP board:
$ ./espy.py /dev/tty.wchusbserial2420:115200 reset AT+RST OK ets Jan 8 2013,rst cause:2, boot mode:(3,6) load 0x40100000, len 1396, room 16 tail 4 chksum 0x89 load 0x3ffe8000, len 776, room 4 tail 4 chksum 0xe8 load 0x3ffe8308, len 540, room 4 tail 8 chksum 0xc0 csum 0xc0 2nd boot version : 1.4(b1) SPI Speed : 40MHz SPI Mode : DIO SPI Flash Size & Map: 8Mbit(512KB+512KB) jump to run user1 @ 1000 n't use rtc mem data{l{lAi-Thinker Technology Co.,Ltd.ready$ ./espy.py /dev/tty.wchusbserial2420:115200 join MySSID my-password AT+CWMODE=1 OK AT+CWJAP="MySSID","my-password"Getting the status:
$ ./espy.py /dev/tty.wchusbserial2420:115200 status AT busy p... OK AT+GMR AT version:0.40.0.0(Aug 8 2015 14:45:58) SDK version:1.3.0 Ai-Thinker Technology Co.,Ltd. Build:1.3.0.2 Sep 11 2015 11:48:04 OK AT+CWMODE? +CWMODE:1 OK AT+CWJAP? +CWJAP:"MySSID","90:72:40:0f:5b:f8",11,-56 OK AT+CIFSR +CIFSR:STAIP,"192.168.10.66" +CIFSR:STAMAC,"5c:cf:7f:8b:56:e1" OK Disconnect from the SSID:
$ ./espy.py /dev/tty.wchusbserial2420:115200 leave AT+CWQAP OK WIFI DISCONNECT Check the status. Confirm: no AP connected.
$ ./espy.py /dev/tty.wchusbserial2420:115200 status AT OK AT+GMR AT version:0.40.0.0(Aug 8 2015 14:45:58) SDK version:1.3.0 Ai-Thinker Technology Co.,Ltd. Build:1.3.0.2 Sep 11 2015 11:48:04 OK AT+CWMODE? +CWMODE:1 OK AT+CWJAP? No AP OK AT+CIFSR +CIFSR:STAIP,"0.0.0.0" +CIFSR:STAMAC,"5c:cf:7f:8b:56:e1" OK NB: diagrams drawn with the custom parts from ESP8266_fritzing.
