2 different frequencies with lilygo-rtl_433

[Dubi256]

Current Situation

Hello,

I have two devices: "TFA Marbella Pool Thermometer" works well with bulild_flag: DCC1101_FREQUENCY=868.00

"Bresser Weather Center 5-in-1" works well with bulild_flag: DCC1101_FREQUENCY=868.30

But both together do not work. What do I have to set so that they work at the same time?

with the original merbanan/rtl_433 both works at the same time with a RTL2832U on a Rasp.

Thanks! Markus

Logs

-

Configuration

build_flags =
  ${com-esp32.build_flags}
  '-UZmqttDiscovery'          ; disables MQTT Discovery
  '-DvalueAsATopic=true'    ; MQTT topic includes model and device
  '-DGateway_Name="OMG_lilygo_rtl_433_ESP"'
  '-DZgatewayRTL_433="rtl_433"'
  '-DZradioSX127x="SX127x"'
  '-DZdisplaySSD1306="LilyGo_SSD1306"'
  '-DDISPLAY_IDLE_LOGO=false'
  '-DOOK_MODULATION=false'
  '-DCC1101_FREQUENCY=868.00'

Environment

• OS: Windows10

Process Supervisor

not applicable

Additional Context

No response

[NorthernMan54]

Experiment with the setting and maybe one  will expand receiver frequency bandwidth Two boards, they are cheap?Write a timer routine to change frequency every few minutes?Run it inside OMG, and change frequencies every few minutes?On Nov 6, 2023, at 2:22 PM, Dubi256 @.***> wrote: Current Situation Hello, I have two devices: "TFA Marbella Pool Thermometer" works well with bulild_flag: DCC1101_FREQUENCY=868.00 "Bresser Weather Center 5-in-1" works well with bulild_flag: DCC1101_FREQUENCY=868.30 But both together do not work. What do I have to set so that they work at the same time? with the original merbanan/rtl_433 both works at the same time with a RTL2832U on a Rasp.

Thanks! Markus Logs

Configuration build_flags = ${com-esp32.build_flags} '-UZmqttDiscovery' ; disables MQTT Discovery '-DvalueAsATopic=true' ; MQTT topic includes model and device '-DGateway_Name="OMG_lilygo_rtl_433_ESP"' '-DZgatewayRTL_433="rtl_433"' '-DZradioSX127x="SX127x"' '-DZdisplaySSD1306="LilyGo_SSD1306"' '-DDISPLAY_IDLE_LOGO=false' '-DOOK_MODULATION=false' '-DCC1101_FREQUENCY=868.00' Environment

OS: Windows10

Process Supervisor not applicable Additional Context No response

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[Dubi256]

Hello NorthernMan54,

First of all, thank you very much for your support!

I have tested all frequencies between 868.00 and 868.30, but unfortunately both devices did not work simultaneously at any frequency.

Do you have any tips on which settings I could change on the receiver? Why can I receive both devices at the same time with the USB-stick and not with the Lilygo?

two devices are of course a possibility....

Thanks!

[NorthernMan54]

@Dubi256 If you look at the data sheet for the transceiver module, they have a lot of settings. https://cdn-shop.adafruit.com/product-files/3179/sx1276_77_78_79.pdf

And they are set here in the code - https://github.com/NorthernMan54/rtl_433_ESP/blob/3fea1cf678212ea5ef70e38f625bc8505f73bb28/src/rtl_433_ESP.cpp#L235

Please keep in mind that the LilyGo and the USB-stick are two totally different technologies, and the signal reception logic between the this package and rtl_433 is totally different. rtl_433 uses a software defined signal demodulator, where this package leverages the signal demodulator with the receiver chipset.

[habub]

The USB sticks have very powerfull receivers designed originally for receiving digital TV (DVB-T). Combined with a PC you can receive and view a wide range of frequencies. I think up to 2 Mhz. Radio receivers are dedicated for a much smaller bandwidth. I'm not sure your 300 khz is within their capabilities. You need to check the specs and maybe test some register modifications.

[1technophile]

You could implement a routine change of frequency for the receiver. Depending on your emitters frequency sending, 5 min at each frequency, for example