Support for changing CC1101 Receive and Transmit Frequency

[NorthernMan54]

Adds the following

1 - Adds a new field on received messages, the MHz of the message ( only visible when compiled for CC1101 ) “mhz”: 303

2 - Add a new message, to set receiver frequency ( optional, default to 433.92 ). Ie { “mhz”: 303.0 }

3 - Add a optional field to transmit message “mhz”

4 - after transmission of a message, the receiver will go back frequency specified in # 2

5 - at this time these changes would only work on the zgatewayrf module.

6 - If an issue occurs while parsing the JSON message an error is transmitted over Mqtt

Sample message to control a Hampton Bay Fan

{"value":1150,"protocol":6,"length":12,"delay":450,"repeat":8,"mhz":303.732}

To change receiver frequency

{"mhz":315.026}

Message Received from a GE Fan Remote on 315Mhz

{"value":4534142,"protocol":6,"length":26,"delay":356,"mhz":315.026}

Response to setting an invalid frequency

{'Status': 'Error'}

PS Two thumbs up on your usage of compiler definitions, makes customizing a build really easy

[1technophile]

Thanks for the PR, could you update the docs also please :
https://docs.openmqttgateway.com/use/rf.html#rcswitch-based-gateway

[Legion2]

In the Somfy module the frequency variable should also be used to reset frequency after transmision. Also do a search with an text editor to find all usages of CC1101_FREQUENCY.

[NorthernMan54]

@Legion2 'In the Somfy module the frequency variable should also be used to reset frequency after transmission'

I was looking at this and am thinking would need a global variable for this. Any other thoughts on how to share the value between modules?

[Legion2]

Yes, the value must be shared, I think the best place is the config_RF.h, which is already shared.

[NorthernMan54]

@Legion2 support for Somfy going back to the global receive frequency has been added. I don’t have the device so I can’t do a physical test, but the build worked. I also named the global variable receiveMhz as that made the most sense.

Any other comments or feedback?

[1technophile]

Thanks guys

[NorthernMan54]

Tks very much gentlemen