ESP
ESP8266
- http://l0l.org.uk/2014/12/esp8266-modules-hardware-guide-gotta-catch-em-all/
- http://www.esp8266.com/wiki/doku.php?id=esp8266_gpio_pin_allocations
- ESPtool with pre-build binaries https://git.48.io/esptool
- Luatool fork https://github.com/hackerspace/luatool
Boards
snajpa's
srk's
Flashing NodeMCU
- Clone ESPtool from https://git.48.io/esptool
<syntaxhighlight lang="bash">git clone https://git.48.io/esptool.git</syntaxhighlight>
- add jumper to flash enable pins - isolated pin header with two pins GPIO0 and GND.
- connect VCC and GND pins to 5V on USB serial converter
- connect ESP RX/TX pins
- try plugging in serial converter, led on the ESP should blink briefly
- flash dev firmware (or debug firmware if needed)
<syntaxhighlight lang="bash">cd esptool ./flash_bin_dev</syntaxhighlight>
- remove jumper
- start terminal with 115200 baudrate
<syntaxhighlight lang="bash">miniterm.py /dev/ttyUSB0 115200</syntaxhighlight>
- disconnect and re-connect power to ESP (preferably without disconnecting USB serial converter as you wouldn't see early boot messages)
- NodeMCU should start
- during first boot you should see Self adjusting flash size and Formatting filesystem messages
- after formatting you should get NodeMCU prompt >
<syntaxhighlight lang="bash">Early boot
$ miniterm.py /dev/ttyUSB0 74880
Program
$ miniterm.py /dev/ttyUSB0 115200
sometimes
$ miniterm.py /dev/ttyUSB0 9600
Flashing custom build nodemcu
./esptool.py -b 921600 write_flash -fm dio 0x00000 bin/0x00000.bin 0x10000 bin/0x10000.bin
NodeMCU build
customization
app/include/user_config.h app/include/user_modules.h app/include/user_version.h</syntaxhighlight>
<syntaxhighlight lang="bash">triac_reg_pinout
0: GPIO16 (no pwm or interrupt!) 1: GPIO5 230 sense 2: GPIO4 triac out 3: GPIO0 (Special: Bootloader when low) 4: GPIO2 5: GPIO14 debug led 6: GPIO12 ws2812 4x4 array 7: GPIO13 8: GPIO15 RX: GPIO3 TX: GPIO1 A0:</syntaxhighlight>
<syntaxhighlight lang="bash">toggle(dir_pin)
slider_pinout
0: GPIO16 1: GPIO5 enable 2: GPIO4 direction 3: GPIO0 (Special: Bootloader when low) 4: GPIO2 debug led 5: GPIO14 step 6: GPIO12 ws2812 4x4 array 7: GPIO13 8: GPIO15 RX: GPIO3 TX: GPIO1 A0:</syntaxhighlight>