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Display Relay Status on NodeRed
#9
if you want to query the relay state, you need send query command by "TCP OUT":
A.Read status of one relay:Send: RELAY-READ-255,x (x is the channel of Relay)
B.Read all relays status by one command:Send: RELAY-STATE-255

Then controller will feedback the state and use "TCP IN" to read , let your LED on/off.

But i think only two way will change the relay state (1: by your software 2: by wall switch from switch terminal board)
if by way-1 , you already can deal with it. way-2, when manual control by switch terminal board, it not need you send query command, controller will auto send message to Node-Red, whick button is pressed, and now is ON or OFF.
it will feedback command like this:
RELAY-KEY-255,x,1,OK (x is the channel of Relay, 1 is ON, 0 is OFF)
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Messages In This Thread
Display Relay Status on NodeRed - by subas - 10-30-2020, 03:36 AM
RE: Display Relay Status on NodeRed - by subas - 10-30-2020, 06:31 AM
RE: Display Relay Status on NodeRed - by admin - 10-30-2020, 08:19 AM
RE: Display Relay Status on NodeRed - by subas - 11-01-2020, 12:46 AM
RE: Display Relay Status on NodeRed - by admin - 11-01-2020, 01:06 AM
RE: Display Relay Status on NodeRed - by admin - 11-01-2020, 01:09 AM
RE: Display Relay Status on NodeRed - by subas - 11-04-2020, 02:31 PM
RE: Display Relay Status on NodeRed - by subas - 11-05-2020, 07:51 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 01:43 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 02:22 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 02:22 AM
RE: Display Relay Status on NodeRed - by subas - 11-06-2020, 03:00 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 03:23 AM
RE: Display Relay Status on NodeRed - by subas - 11-06-2020, 03:27 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 03:44 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 03:51 AM
RE: Display Relay Status on NodeRed - by subas - 11-06-2020, 04:27 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 06:19 AM
RE: Display Relay Status on NodeRed - by subas - 11-06-2020, 06:55 AM
RE: Display Relay Status on NodeRed - by admin - 11-06-2020, 07:36 AM
RE: Display Relay Status on NodeRed - by Adrian - 11-21-2020, 08:19 PM
RE: Display Relay Status on NodeRed - by admin - 11-22-2020, 02:21 AM
RE: Display Relay Status on NodeRed - by Adrian - 11-22-2020, 07:39 PM
RE: Display Relay Status on NodeRed - by admin - 11-23-2020, 01:00 AM
RE: Display Relay Status on NodeRed - by Adrian - 11-23-2020, 01:15 PM
RE: Display Relay Status on NodeRed - by admin - 11-24-2020, 06:44 AM
RE: Display Relay Status on NodeRed - by Adrian - 11-24-2020, 01:21 PM
RE: Display Relay Status on NodeRed - by admin - 11-25-2020, 01:18 AM
RE: Display Relay Status on NodeRed - by Adrian - 11-30-2020, 01:35 PM
RE: Display Relay Status on NodeRed - by admin - 12-01-2020, 12:47 AM
RE: Display Relay Status on NodeRed - by admin - 12-08-2020, 04:48 AM
RE: Display Relay Status on NodeRed - by admin - 11-14-2022, 10:13 AM
RE: Display Relay Status on NodeRed - by admin - 11-14-2022, 11:33 AM
RE: Display Relay Status on NodeRed - by admin - 11-14-2022, 10:39 PM
RE: Display Relay Status on NodeRed - by admin - 11-14-2022, 10:39 PM
RE: Display Relay Status on NodeRed - by admin - 11-15-2022, 08:30 AM
RE: Display Relay Status on NodeRed - by admin - 11-15-2022, 02:57 PM
RE: Display Relay Status on NodeRed - by admin - 11-15-2022, 09:28 PM
RE: Display Relay Status on NodeRed - by admin - 11-16-2022, 12:18 AM

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