Comments (7)
How to solve it ?!
from motor_shield_firmware.
I didn't I switched to another shield
from motor_shield_firmware.
I think there are problem about the fixed packet length. This code seems to wait 4 bytes to continue...
I tried a simple i2c scanner for arduino, and after the first (successfull) scan, the module starts to mess up the entire I2C bus... and of course it can't be reached until reset!
from motor_shield_firmware.
There is a new motor_shield.bin available which fixed I2C issue.
See espeasy plugin wiki.
https://www.letscontrolit.com/wiki/index.php?title=WemosMotorshield
Download the motor_shield.bin:
https://cdn.hackaday.io/files/18439788894176/motor_shield.bin
or
https://github.com/pbugalski/wemos_motor_shield
Download STM32Flash from here https://sourceforge.net/projects/stm32flash/files/
Extract and put the above files into a directory
Plug in your USB serial device and make a note of the COM port it uses
Those of you who want to do this using Window's 8/10:
Window Command Prompt cd to the directory
-
'stm32flash.exe COM9' replace COM9 with your COM port number
-
'stm32flash.exe -k COM9' This will unlock your shield
-
'stm32flash.exe -f -v -w motor_shield.bin COM9' This will flash the bin and re-lock the shield.
WemosMotorshield03.PNG
Then disconnect all the wires (including the RTS pin), connect the shield to your ESP device (eg. WeMos D1 Mini), and it should work.
see also: https://hackaday.io/project/18439-motor-shield-reprogramming
from motor_shield_firmware.
@TungstenE2 When I have flashed the new firmware, do I then need to desolder any of the I2C and the RST pads?
from motor_shield_firmware.
@TungstenE2 When I have flashed the new firmware, do I then need to desolder any of the I2C and the RST pads?
the was no need for soldering in may case, as far as I remember
from motor_shield_firmware.
@TungstenE2 So you never soldered any of the pads underneath?
from motor_shield_firmware.
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from motor_shield_firmware.