ODrive UART issues with Python files

Support
1

Hi Everyone,

I’m currently trying to use UART to communicate from a Raspberry Pi B3+ to a 24V Odrive, but am getting an error (shown below), when I run this simply python script:

Error:

[FIBRE] transport layer "serial" not implemented

Code:

import odrive
import serial

def main():
    print("Connection to Odrive...")
    o = odrive.find_any("serial:/dev/ttyAMA0")
    ...

I understand that odrivetool had their UART implementation removed, but I was wondering if it was removed for running regular python script in the native protocol.

Additional Notes:

  1. I double checked that the connections from the Raspberry Pi B3+ to the Odrive were correct:
  • Gnd <-> Gnd
  • Tx of Odrive (GPIO1) <-> Rx of Raspberry Pi (Pin 10)
  • Rx of Odrive (GPIO2) <-> Tx of Raspberry Pi (Pin 8)
  1. This is how I configured the ODrive via USB before removing the connection for UART:
odrv0.config.enable_uart_a = True 
odrv0.config.gpio1_mode = GPIO_MODE_UART_A
odrv0.config.gpio2_mode = GPIO_MODE_UART_A 
odrv0.config.uart0_protocol = STREAM_PROTOCOL_TYPE_FIBRE
odrv0.reboot()
  1. I ensured that the UART wiring was enabled on the Raspberry Pi B3+ before attempting to use UART on the Odrive

I understand that odrivetool isnt set up to use UART currently, but does this affect regular python scripts too? (Odrivetool with UART does not seem to work - githubhot)

I was wondering if anybody had any other reccomendations on things we could try to get this to work?

1 Like
2

Yeah sorry this affects regular Python scripts too. odrivetool is only a thin shell/wrapper around the Python module itself.

3

If you need native UART, you can revert to version 0.5.1. It still works there.

1 Like
4

Will I need to flash version 0.5.1 on the actual odrive firmware?

5

You need to flash the official odrive firmware 0.5.1 to your ODrive. There is documentation out there on how to do that.