PowerHat Python API debugging

Sixfab Power HAT & Software
1

Looking for any pointers on this.
I’m running a Powerhat (v1) on a Oratek Tofu (same 40 pin as the pi4) and experiencing some issues with the sixfab-power-python-api in my own python script.

During testing this is the error I’m getting.

root@703fdb0:/app# python3
Python 3.10.4 (main, Apr  8 2022, 18:47:39) [GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from power_api import SixfabPower, Definition, Event
>>> api = SixfabPower()
>>> api.get_battery_level()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/power_api/power_api.py", line 472, in get_battery_level
    command.create_command(command.PROTOCOL_COMMAND_GET_BATTERY_LEVEL)
  File "/usr/local/lib/python3.10/site-packages/power_api/command.py", line 243, in create_command
    (crc_high, crc_low) = self.calculate_crc16(buffer_send[0:PROTOCOL_HEADER_SIZE])
  File "/usr/local/lib/python3.10/site-packages/power_api/command.py", line 327, in calculate_crc16
    cal_crc = crc16.crc16xmodem(bytes(command))
SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats

I’m not even sure how to interpret this error message. Any suggestions?

2

I thought perhaps this was a hardware issue, but it appears as though my Pi has no issue seeing the Powerhat.

root@703fdb0:/app# i2cdetect -l
i2c-1	i2c       	bcm2835 (i2c@7e804000)          	I2C adapter

Appears to show that i2c is enabled. And…

root@703fdb0:/app# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- 41 -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Appears to show that it is detecting the correct hardware address for the Powerhat as well which according to the docs is 0x41.

Is this a bug in the Power API v1 code?