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Success! This version manages to elicit the occasional response from my inverter!

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This commit is contained in:
Martin Grill 2022-03-28 11:20:29 +02:00
parent ddb7a97a87
commit a19a392448
1 changed files with 17 additions and 2 deletions
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19
tools/rpi/ahoy.py
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@ -37,12 +37,16 @@ def ser_to_esb_addr(s):
"""
Convert a Hoymiles inverter/DTU serial number into its
corresponding NRF24 'enhanced shockburst' address byte sequence (5 bytes).
*
The NRF library expects these in LSB to MSB order, even though the transceiver
itself will then output them in MSB-to-LSB order over the air.
The inverters use a BCD representation of the last 8
digits of their serial number, in reverse byte order,
followed by \x01.
"""
return ser_to_hm_addr(s)[::-1] + b'\x01'
air_order = ser_to_hm_addr(s)[::-1] + b'\x01'
return air_order[::-1]
def compose_0x80_msg(dst_ser_no=72220200, src_ser_no=72220200, ts=None):
"""
@ -76,12 +80,23 @@ def compose_0x80_msg(dst_ser_no=72220200, src_ser_no=72220200, ts=None):
p = p + struct.pack('B', crc8)
return p
def print_addr(a):
print(f"ser# {a} ", end='')
print(f" -> HM {' '.join([f'{x:02x}' for x in ser_to_hm_addr(a)])}", end='')
print(f" -> ESB {' '.join([f'{x:02x}' for x in ser_to_esb_addr(a)])}")
def main_loop():
"""
Keep receiving on channel 3. Every once in a while, transmit a request
to one of our inverters on channel 40.
"""
print_addr(inv_ser)
print_addr(dtu_ser)
ctr = 1
while True:
radio.setChannel(3)