When you run the wr_rrd_update.py, it should store the data in sensors.rrd and weather.rrd file in /usr/share/weatherradio.
wr_rrd_lastupdate.py creates a JSON document in /usr/share/weatherradio/data

The RTsensors_lastupdate should look like that:

{
  "BME280_Hum":null,
  "BME280_Pres":null,
  "BME280_Temp":null,
  "DHT_Hum":29.70000076,
  "DHT_Temp":24.10000038,
  "MLX90614_Tamb":23.90999794,
  "MLX90614_Tobj":24.42998695,
  "TSL2591_Lux":19.059606549999998,
  "timestamp":1650283441000
}


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