By looking at the LED's (LED C configured as B and LED D configured as T), there seems to be a message which is sent to the thermostat after transmitting and receiving MessageID 57, while there isn't a thermostat connected.
Code: Select all
21:26:19.592816 OpenTherm Gateway 5.3
21:26:19.634884 Thermostat disconnected
21:26:20.563054 R00000000 Read-Data Status: 00000000 00000000
21:26:20.658087 BC0000000 Read-Ack Status: 00000000 00000000
21:26:21.581012 R80190000 Read-Data Boiler water temperature: 0.00
21:26:22.571315 R80190000 Read-Data Boiler water temperature: 0.00
21:26:22.681723 B40191700 Read-Ack Boiler water temperature: 23.00
21:26:23.596453 R10010000 Write-Data Control setpoint: 0.00
21:26:23.691569 BD0010000 Write-Ack Control setpoint: 0.00
21:26:24.615230 R00060000 Read-Data Remote parameter flags: 00000000 00000000
21:26:25.603912 R00060000 Read-Data Remote parameter flags: 00000000 00000000
21:26:25.712486 B40060301 Read-Ack Remote parameter flags: 00000011 00000001
21:26:26.619393 R00110000 Read-Data Relative modulation level: 0.00
21:26:26.720131 BC0110000 Read-Ack Relative modulation level: 0.00
21:26:27.650908 R001B0000 Read-Data Outside temperature: 0.00
21:26:28.640688 R001B0000 Read-Data Outside temperature: 0.00
21:26:28.735172 B601B0000 Data-Inv Outside temperature: 0.00
21:26:29.652226 R801C0000 Read-Data Return water temperature: 0.00
21:26:29.763061 B401C1800 Read-Ack Return water temperature: 24.00
21:26:30.679113 R900E6400 Write-Data Maximum relative modulation level: 100.00
21:26:30.774015 B500E6400 Write-Ack Maximum relative modulation level: 100.00
21:26:31.706056 R00300000 Read-Data DHW setpoint boundaries: 0 0
21:26:31.799355 B40303F26 Read-Ack DHW setpoint boundaries: 63 38
21:26:32.714280 R00000000 Read-Data Status: 00000000 00000000
21:26:32.825221 BC0000000 Read-Ack Status: 00000000 00000000
21:26:33.737059 R80190000 Read-Data Boiler water temperature: 0.00
21:26:34.736530 R80190000 Read-Data Boiler water temperature: 0.00
21:26:34.830195 B40191700 Read-Ack Boiler water temperature: 23.00
21:26:35.745545 R10010000 Write-Data Control setpoint: 0.00
21:26:35.854108 BD0010000 Write-Ack Control setpoint: 0.00
21:26:36.769659 R80380000 Read-Data DHW setpoint: 0.00
21:26:37.762926 R80380000 Read-Data DHW setpoint: 0.00
21:26:37.873063 BE0383F00 Data-Inv DHW setpoint: 63.00
21:26:38.786700 R00390000 Read-Data Max CH water setpoint: 0.00
21:26:38.882324 B40394900 Read-Ack Max CH water setpoint: 73.00
21:26:57.286287 Command: PR=Q
21:26:57.343862 PR: Q=L
Code: Select all
SendMessage movlw 1
movwf quarter ;Initialize the state counter
bsf NextBit ;Start bit is 1
bsf Transmit ;Starting to transmit a message
movlw 'X' ;Transmit function
pagesel Message
call SwitchOnLED ;Switch on the transmit LED
movlw 'T' ;Thermostat function
btfss MsgResponse
SendBoiler movlw 'B' ;Boiler function
; In package Message
call SwitchOnLED ;Switch on the boiler or thermostat LED
movlw SlaveMask ;Transmitting to the boiler
btfsc MsgResponse ;Check message direction
movlw MasterMask ;Transmitting to the thermostat
movwf outputmask
movlw 34 ;A message is 32 bits + start & stop bit
movwf bitcount ;Load the counter
bsf STATUS,RP0
bsf PIE1,TMR2IE ;Enable timer 2 interrupts
bcf STATUS,RP0
movlw PERIOD
movwf TMR2 ;Prepare timer 2 to overflow asap
bsf T2CON,TMR2ON ;Start timer 2