I just got my SRM power meter back from getting a new battery and getting tested out. I also just started measuring the SRM power simultaneously with my Garmin 945 watch and with Trainerroad (not in erg mode, but in standard mode with my KICKR). I calibrated the power meter with both the watch and TR and got the exact same offset, yet when I pedal, TR is reporting that the SRM is sending power data that is about 25 Watts lower than the Garmin 945 at power readings from very low (50w) to at least 225w.
I tried switching the watch between smart recording and 1 sec recording but the difference remained. I also told TR to “forget” my KICKR but that had no effect on the monitoring differential.
I am using a 2015 Macbook Pro with an ANT+ dongle on a six inch extension cable.
Has anyone else ever seen this?