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CongducPham / LowCostLoRaGw

Low-cost LoRa IoT & gateway with SX12XX (SX1261/62/68; SX1272/76/77/78/79; SX1280/81), RaspberryPI and Arduino boards
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Receive error 4 #227

Closed Fionn-Mac-Cumhaill closed 5 years ago

Fionn-Mac-Cumhaill commented 6 years ago

Hi,

I currently have a RPi gateway set up with a dragino rpiHAT and three arduino end devices, each with Dragino arduino shields. I have all three devices and the gateway set to lora_mode 1.

Data is being received from the unit closest to the device, from the second one but not as regularly and no data is being received from the third end node (approx 800m away)

In the processing log I am intermittently getting a "Receive error 4". What does this error signify? Is it an indication of device 3 trying (but failing to connect?)

Any help in this matter would be greatly appreciated. Thank you again for the fantastic depository and all the work put into the detailed documentation.

Kind Regards, Tadhg.

Below is a screenshot of the gateway log. gwlog_receive_error4

CongducPham commented 6 years ago

Hi, looks like you are sending quite fast. Receive error 4 indicates that the reception has been incorrect for various reasons. I believe it is because of you sending rate. LoRa is not suitable for high sending rate.

Fionn-Mac-Cumhaill commented 5 years ago

That makes a lot of sense. Thank you for your response.