after my Polar T31 and T61 (both coded) belts didnīt work well with GH615M (10-30 beats more than in reality while biking or running) I tried an older uncoded Polar-belt. Maybe the battery in this older ting isnīt very good, but the Polar showed the heartbeat correctly and the GH615M didnīt detect the belt at all.
I thought it could have to do with the coding of the signal but I ask myself why the GH615M works fine the first times I used it with the new beta-firmware and now the heartrate is not useable anymore. Maybe it could have to do with the free memory capacity? Or does it have to do with the saving-period? (every second, every 2 seconds ...)?
I have deleted old trackpoints now and Iīm very exited if the heartrate will be correct at my next training.
An other thing I watched yesterday was, the battery was 3/4 full after 2,25 hours jogging with the cardio-mode off. When I activate the cardio-mode, the battery will be empty after 4,5 hours. Could it be the cardio-mode needs much more energy, may be for the new algorithm for heartrate-correction in the new beta-firmware?
I would be happy if you can check this.
I was very happy about implementing my idea to show the AVG HR with the lap-time, but with the extremly wrong heatrate the AVG-HR is also not useful.
so, keep on coocking