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 —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[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 -

rtl_433_ESP/src/rtl_433_ESP.cpp

Line 235 in 3fea1cf

#if defined(RF_SX1276) || defined(RF_SX1278)

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