ESP-01 Module + Simple DIY Dev Board (based on this)
- Install
esptoolto backup/change/update ESP8266 firmware - Clone git repository
https://github.com/themadinventor/esptool$ git clone https://github.com/themadinventor/esptool.git Cloning into 'esptool'... ...
cd esptool- run install routine
$ sudo python setup.py install Password: running install ... Installing esptool.py script to /usr/local/bin
- Connect ESP8266 ESP-01 Board via CH340G Converter to MBP
- Install CH340G driver (WCH provides a signed driver)
- Identify the tty port
$ ls /dev/tty.w* /dev/tty.wchusbserial410
- activate ESP boot loader (needs to be repeat before each esptool command) by reset ESP and pull GPIO 0 to GND meanwhile.
- Check communication
$ esptool.py --port /dev/tty.wchusbserial410 --baud 115200 flash_id Connecting... Manufacturer: c8 Device: 4013 $ esptool.py --port /dev/tty.wchusbserial410 --baud 115200 chip_id Connecting... Chip ID: 0x009b82bc
- (optional) make a backup of the original firmware - takes about 48sec
$ time esptool.py --port /dev/tty.wchusbserial410 --baud 115200 read_flash 0x000 524288 fw_backup.bin Connecting... Please wait... real 0m47.721s user 0m0.762s sys 0m0.344s
(Note: ESP12-E has a bigger flash - 4MB = 4194304) - Flash alternative firmware - I want to give NodeMCU firmware a try
- Use standard NodeMCU firmware (download from github) or
- Config your own customized NodeMCU firmware
- Get the download links (integer and float version) about 2min later (you can also use the preconfigured
- Flash it to the ESP-01 (I start with the integer version)
$ time esptool.py --port /dev/tty.wchusbserial410 --baud 115200 write_flash 0x00000 nodemcu-master-9-modules-2016-03-29-19-22-38-integer.bin Connecting... Erasing flash... Took 1.22s to erase flash block Wrote 403456 bytes at 0x00000000 in 48.2 seconds (66.9 kbit/s)... Leaving... real 0m50.195s user 0m0.383s sys 0m0.126s
- Connect to ESP. I use SerialTools (AppStore Link) - Note: Baud Rate is 76800
