Operating lorawan

RSSI and SNR must be considered to evaluate the radio link quality. You can find these levels somewhere on your LoRaWAN Network Server.

• RSSI is the received signal strength
• SNR is the signal noise rate and give indication on the ambient noise level

• Radio link can be considered has GOOD when RSSI > -115dB and SNR > -7dB
• Radio link is BAD (range limit) when RSSI <= -120 dB or SNR <= -13dB

Between this 2 cases

If RSSI is good (> -115dB) but SNR bad (<= -13dB)

It means that the environment of the gateway is very noisy. SNR must be checked during many days to be sure that the radio link is enough stable to receive all messages.

If RSSI is bad ( <=-120dB) but SNR good (> -7dB)

It means that device is probably far away from the gateway.

If you see error messages like _Downlink transmission failed with result TOO_EARLY, your gateway may suffer from a slow internet backhaul.

You might schedule a time delay in TTN's gateway settings. The better option of course is looking for a better internet connection.