<![CDATA[LoPy4 - Narrow bandwidth modes (7.8/10.4/62.5 kHz)]]>I have a couple of LoPy4's and am interesting in experimenting with the narrower bandwidth modes. The micropython API for LoRa allows me to set the 500/250/125 kHz modes as per the examples on the Pycom web site and elsewhere but I cannot see how to set the bandwidth to the narrow bandwidths e.g. 7.8/10.7/62.5 kHz.

Is it possible with the currrent LoPy4 firmware to set these modes and if so what is the API call? If not, is there a possibility of having these modes added to the next firmware release?

Failing the above, is it possible to programe these narrow bandwidth modes by bit/bang the SX1276 LoRa chip directly from micropython API calls?

]]>https://forum.pycom.io/topic/4784/lopy4-narrow-bandwidth-modes-7-8-10-4-62-5-khzRSS for NodeWed, 22 Apr 2026 04:34:12 GMTFri, 03 May 2019 08:33:02 GMT60<![CDATA[Reply to LoPy4 - Narrow bandwidth modes (7.8/10.4/62.5 kHz) on Fri, 03 May 2019 08:33:02 GMT]]>I have a couple of LoPy4's and am interesting in experimenting with the narrower bandwidth modes. The micropython API for LoRa allows me to set the 500/250/125 kHz modes as per the examples on the Pycom web site and elsewhere but I cannot see how to set the bandwidth to the narrow bandwidths e.g. 7.8/10.7/62.5 kHz.

Is it possible with the currrent LoPy4 firmware to set these modes and if so what is the API call? If not, is there a possibility of having these modes added to the next firmware release?

Failing the above, is it possible to programe these narrow bandwidth modes by bit/bang the SX1276 LoRa chip directly from micropython API calls?

]]>https://forum.pycom.io/post/27671https://forum.pycom.io/post/27671Fri, 03 May 2019 08:33:02 GMT<![CDATA[Reply to LoPy4 - Narrow bandwidth modes (7.8/10.4/62.5 kHz) on Fri, 03 May 2019 08:39:17 GMT]]>@AlbertMcG It is not only firmware but hardware. For narrow bandwidth (less then 125kHz) you need a higher stability oscillator, I mean a TXCO. I do not know circuit diagram of LoPy4, check the XTAL oscillator part.

]]>https://forum.pycom.io/post/27672https://forum.pycom.io/post/27672Fri, 03 May 2019 08:39:17 GMT<![CDATA[Reply to LoPy4 - Narrow bandwidth modes (7.8/10.4/62.5 kHz) on Fri, 03 May 2019 08:43:44 GMT]]>Yes. I saw that I would need a more stable oscillator somewhere else on the web. I have no problem sorting that out but it still leaves me needing the API calls.

]]>https://forum.pycom.io/post/27674https://forum.pycom.io/post/27674Fri, 03 May 2019 08:43:44 GMT