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sui77 / rc-switch

Arduino lib to operate 433/315Mhz devices like power outlet sockets.
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Support for chipset FHT7901T Ver1.1 #339

Open crainsaw opened 4 years ago

crainsaw commented 4 years ago

Hello, I have bought Meister Funksteckdosen-Set 3+1, 3680 W, IP20, 7474230 and they use the chipset FHT7901T Ver1.1 for 433 MHz communication.

Is it possible to add support for this chipset as well? If not I would be happy about a tutorial link for how to reverse engineer such a protocol.

Thanks in advance!

holesond commented 4 years ago

After looking at the FHT7901T Ver1.1 PCB, I think the board might be using an LX2262 encoder (http://en.chiptrue.com/images/LX2262_en.pdf), which is said to be compatible with PT2262. Furthermore, FHT-7901 is mentioned several times in https://github.com/sui77/rc-switch/wiki/List_KnownDevices. Thus I guess it could already be supported by rc-switch. If that is not the case, Li-Wen Yip wrote a tutorial on decoding the signals of LX2262 and some other encoder, see https://www.liwen.id.au/arduino-rf-codes/.

crainsaw commented 4 years ago

After looking at the FHT7901T Ver1.1 PCB, I think the board might be using an LX2262 encoder (http://en.chiptrue.com/images/LX2262_en.pdf), which is said to be compatible with PT2262. Furthermore, FHT-7901 is mentioned several times in https://github.com/sui77/rc-switch/wiki/List_KnownDevices. Thus I guess it could already be supported by rc-switch. If that is not the case, Li-Wen Yip wrote a tutorial on decoding the signals of LX2262 and some other encoder, see https://www.liwen.id.au/arduino-rf-codes/.

Thank you very much for the info! Its not currently working with RC-Switch. I will try the mentioned solution from Li-Wen Yip.

1technophile commented 4 years ago

Did you tried to follow this tutorial? https://github.com/sui77/rc-switch/wiki/Add_New_Remote_Part_1

holesond commented 4 years ago

Recently, I tried controlling an FHT7901T outlet with RC-Switch.

Firstly, I tried protocol 1, pulse width 150 (suggested in List_KnownDevices) and the switchOn/switchOff functions for "Type A: 10 pole DIP switches" and "Type B: Two rotary/sliding switches" mentioned in https://github.com/sui77/rc-switch/wiki/HowTo_OperateLowCostOutlets. These did not work with my outlet DIP switch code 10000 10000 (1-on, 0-off).

Secondly, I used a 433 MHz receiver and the ReceiveDemo_Simple example from rc-switch to receive the bit sequence transmitted by the original remote control transmitter. For the DIP switch code 10000 10000, the transmitted sequences were (decimal data encoding):

These codes transmitted via RC-Switch work, the outlet can be switched on and off. Setup commands used: mySwitch.setProtocol(1); mySwitch.setPulseLength(150); Control commands: mySwitch.send(13976916, 24); // switch on mySwitch.send(13976913, 24); // switch off (I have not tried adding this FHT7901T as a new device to the rc-switch library yet.)