Best posts made by cloolalang

433 MHz ESP 32 MQTT Gateway with proper antenna

Tips for connecting the LoRa Radios:

1. Use de-coupling capacitor on power supplies (as per above other radios).
2. Carefully select: MY_RFM95_TX_POWER_DBM and MY_RFM95_MAX_POWER_LEVEL_DBM as Semtech spec states +20dBm output power is only for 1% duty cycle operations, and some modules (AI-Thinker RA-02) are only rated as +18dbm.
3. If you build a LoRa radio gateway using an ESP32 (for example), take care to provide a separate, low-noise 3.3V power supply to the radio as the on-board voltage regulator may not be able to supply enough current at the higher RF output power levels.

@cloolalang
So I have two KQ-330 on the lab bench.
So far we find:

1. carrier 132.5khz FSK modulation.
2. With two units connected together on 220 VAC mains - im seeing around 45-5- Baud, listening on an AM radio nearby the units it sounds like morse code at around 23WPM without mains, 30WPM with mains.
3. Carrier is about 5v p-p on the scope, not very clean waveform.
4. Uart is 9600 8n1
5. Transmit buffer 253 Bytes

I will test with mysensors RS485 gateway and sensor mode, with the transport time-outs increased to maybe 10000ms!
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