m5stack-esp12-shield's Introduction

ESP12 Flasher for M5Stack-ESP12-Shield

PIN Mapping:

     M5Stack | ESP12
 ------------+------------
    16 (Rx2) | D1 (TX0)
    17 (Tx2) | D3 (RX0)
          12 | D0 (FLASH)
          13 | RESET
        3.3v | VCC
        3.3v | D2
        3.3v | CH_PD (EN)
         GND | GND
         GND | D15

Using the Arduino IDE:

Compile & Upload this sketch on the M5Stack
Change board to ESP8266
Set Baudrate to "115200"
Set Flash Mode to "DOUT"
Set Reset Method to "no dtr (aka ck)"
Open your ESP8266 sketch
Hit the Button B on the M5 so the ESP8266 waits for flashing
Hit the Upload button

Also acts as a serial bridge (115200) after flash timeout.

ESP8266 Flash settings

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m5stack-esp12-shield's Issues

Help with SPIFFS uploader ignoring boards settings

The current ESP8266 Sketch Data Upload tool fails as it ignores the "reset method" and "flash mode" board settings,

esptool.py v2.8
Serial port /dev/ttyUSB0
Connecting........_
Chip is ESP8266EX
Features: WiFi
WARNING: Detected crystal freq 20.33MHz is quite different to normalized freq 26MHz. Unsupported crystal in use?
Crystal is 26MHz
MAC: 00:08:ff:00:00:00
Uploading stub...
Running stub...
Traceback (most recent call last):
  File "~/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/upload.py", line 65, in <module>
    esptool.main(cmdline)
  File "~/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool/esptool.py", line 2909, in main
    esp = esp.run_stub()
  File "~/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool/esptool.py", line 637, in run_stub
    p = self.read()
  File "~/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool/esptool.py", line 292, in read
    return next(self._slip_reader)
  File "~/.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/esptool/esptool.py", line 2057, in slip_reader
    raise FatalError('Invalid head of packet (0x%s)' % hexify(b))
esptool.FatalError: Invalid head of packet (0x46)
SPIFFS Upload failed!

Possible workarounds:

Manual upload
~/.arduino15/packages/esp8266/tools/python3/3.7.2-post1/python3 /.arduino15/packages/esp8266/hardware/esp8266/2.7.4/tools/upload.py --chip esp8266 --port /dev/ttyUSB0 --baud 115200 --before no_reset --after soft_reset write_flash 0x100000 /tmp/arduino_build_15608/Unpack_targz_file.spiffs.bin
OTA SPIFFS upload (from esp32 to esp8266, or from Arduino IDE)