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Add module identification command (relay id)

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This commit is contained in:
Eddy de Vink 2026-08-13 12:17:54 +02:00
commit cbb0d672f6
3 changed files with 10 additions and 5 deletions
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11
relay
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@ -1,15 +1,16 @@
#!/usr/bin/env python3
"""Toggle the USB relay via serial: ./relay 1|0 [serial_port]."""
"""Toggle the USB relay via serial: ./relay 1|0|id [serial_port]."""
import sys
import serial
DEFAULT_PORT = "/dev/cu.usbserial-2110"
def main() -> int:
if len(sys.argv) not in (2, 3) or sys.argv[1] not in ("0", "1"):
print(f"Usage: {sys.argv[0]} 0|1 [serial_port]", file=sys.stderr)
if len(sys.argv) not in (2, 3) or sys.argv[1] not in ("0", "1", "id"):
print(f"Usage: {sys.argv[0]} 0|1|id [serial_port]", file=sys.stderr)
return 1
command = sys.argv[1]
serial_cmd = "?" if command == "id" else command
port = sys.argv[2] if len(sys.argv) == 3 else DEFAULT_PORT
try:
# dtr/rts expliciet uit vóór open: voorkomt (of beperkt) de CH340
@ -32,12 +33,12 @@ def main() -> int:
# binnen 2 s (timeout, readline geeft b"") = geen reset: door.
s.readline()
s.reset_input_buffer()
s.write(command.encode())
s.write(serial_cmd.encode())
s.flush()
reply = s.readline().decode(errors="replace").strip()
finally:
s.close()
if reply in ("ON", "OFF"):
if reply in ("ON", "OFF") or (command == "id" and reply.startswith("ID ")):
print(reply)
return 0
print(f"ERROR: no valid reply from board (got {reply!r})", file=sys.stderr)