15-09-2023, 12:01 PM
ELRS telemetry can cause confusion for flyers migrating from other RC equipment where for example RSSI is a percentage and a positive number. These 2 videos are useful guides to the differences in elrs telemetry.
One principle is that RSSI is better understood when you take account of your packet rate. When I run my lua script on my Radiomaster, it shows typical values for an airplane flyer:
packet rate 100 Hz (full) (-112db)
telemetry ratio 1:32
switch mode 8
Tx power 100mw (dynamic)
Notice (-112 db) after the packet rate, that is the limit for RSSI, any lower will mean a failsafe. This limit is different for different packet rates. Bardwell recommends a buffer of around 10 db, so I set my RSSI warning for an rssi of -102.
Bardwell on RSSI
https://www.youtube.com/watch?v=LnWdIssBk-c
Bardwell on Troubleshooting Failsafes (using telemetry)
https://www.youtube.com/watch?v=s4EcxopG-Qo&t=700s
One principle is that RSSI is better understood when you take account of your packet rate. When I run my lua script on my Radiomaster, it shows typical values for an airplane flyer:
packet rate 100 Hz (full) (-112db)
telemetry ratio 1:32
switch mode 8
Tx power 100mw (dynamic)
Notice (-112 db) after the packet rate, that is the limit for RSSI, any lower will mean a failsafe. This limit is different for different packet rates. Bardwell recommends a buffer of around 10 db, so I set my RSSI warning for an rssi of -102.
Bardwell on RSSI
https://www.youtube.com/watch?v=LnWdIssBk-c
Bardwell on Troubleshooting Failsafes (using telemetry)
https://www.youtube.com/watch?v=s4EcxopG-Qo&t=700s