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Published 20 hours ago • verified publisher icon sandeepmistry

Problem with setting Tx power

Open Nehuix opened this issue 3 years ago • 2 comments

Hi guys! I am currently using two sx1278 with the spiral antenna that usually comes with it. I am using the basic LoRaReceiver and LoRaSender examples and my problem is that even though they are side by side, I get an RSSI between -50 and -60. I have tried changing the output power with setTxPower() with values between 1 to 14 and there seems to make no difference on the RSSI values. I wonder if I am doing something wrong in the code or is it because of the antenna. Thanks in advance.

Nehuix avatar Jul 13 '21 00:07 Nehuix

Can you show your real photo of kit? What is your LoRa chip? ra01/02/RFM? What is your LoRa antenna? What is the signal frequency?

Normally, with the best antenna for ra01/02 at 433Mhz, I can only get around -30 to -40 RSSI max. For RFM95 at 915Mhz, I can get up to -6 RSSI.

However, it doesnt make any real difference to me at around 3-5m and above.

IoTThinks avatar Jul 13 '21 04:07 IoTThinks

Sorry I just replied. I've been travelling and couldn't respond any sooner. I don't currently have the circuit with me but this is the module I am using (I welded it to a propper pcb). 1-Mini-LoRa-Module-1

I'm also working at 433MHz and the antenna is the same as the picture. I also bought a 16dbi antenna and the UFL joing for the module, but still haven't recieved it. D_NQ_NP_940082-MLA31066451755_062019-V

Hope this info is usefull. Thanks in advance.

Nehuix avatar Aug 03 '21 00:08 Nehuix