09-May-2021, 11:23 AM
Hello there, hope y'all doing well!
Let me note that I came across this thread, which seems to address a very similar problem.
https://intofpv.com/t-current-meter-prob...ack?page=2
But in contrast to the behaviour observed by the people there, my problems didn't exist from the beginning, but only came up after a year. Which would mean, that in fact, the sensor was working fine for a year and then suddenly gave up.(?) Also their readings seem to be consistantly wrong, while mine are sometimes correct.
Maybe, someone still has some aces up their sleeves so i thought I'll try my luck
Relevant Hardware:
ESC: T-Motor F55A Pro 2
FC: T-Motor DJI F7 HD
A little explaining:
About a year ago, i built my first FPV quad, set it all up and somehow managed to keep it running with no problems whatsoever.
OSD all working fine, Current & Voltage readings have been properly adjusted in Betaflight & are accurate (verified).
I'm using the mAh-reading in the OSD to determine when to land, so I'm relying on an accurate measure there.
As said, this has all been working perfectly well for over a year now. But there's this weird issue creeping up that the current readings are all over the place.
This makes me rely on the Voltage, which feels more like eyeballing it to me, though it seems to work for me as well.
Still, I would really like to understand the problem and maybe fix it.
The issue:
A couple of weeks ago, I noticed my mAh-readings were way too high. The same goes for the Amp-reading as they correlate. Now I started looking for patterns and what I found was:
- Sometimes, the current readings are about 8-10x higher than they should be, making the reading absolutely useless
- Sometimes, the current readings start off correctly, but suddenly get out of hand
- Sometimes, I even fly 2-3 packs in a row with the current reading being perfectly fine
What I kinda worked out already:
- The only issue seems to be the readout of the current sensor, as the quad is still flying exactly the same way it did before, all functionality seems to be given.
- I assume it must be hardware related. I verified the betaflight settings and, as stated, the readings are correct sometimes.
- To me, it feels very much related to the current sensor, but I'm lacking the expertise here.
- I checked the batteries in detail, there is no correlation. Flying the same battery, reading might work or it might not.
Now, the questions I have:
- Has anyone experienced a similar behaviour on their hardware, or can maybe even explain it?
- If the current sensor is the culprit, is there any way to fix it or do I need to get a new ESC-board?
- Could this be caused by some sort of short circuit somewhere on the board?
Soo, I hope I managed to give you the relevant information, if you need any more, just let me know.
I'd be happy about any inputs you guys can give me!
Thank you all in advance, all the best and stay healthy
Let me note that I came across this thread, which seems to address a very similar problem.
https://intofpv.com/t-current-meter-prob...ack?page=2
But in contrast to the behaviour observed by the people there, my problems didn't exist from the beginning, but only came up after a year. Which would mean, that in fact, the sensor was working fine for a year and then suddenly gave up.(?) Also their readings seem to be consistantly wrong, while mine are sometimes correct.
Maybe, someone still has some aces up their sleeves so i thought I'll try my luck
Relevant Hardware:
ESC: T-Motor F55A Pro 2
FC: T-Motor DJI F7 HD
A little explaining:
About a year ago, i built my first FPV quad, set it all up and somehow managed to keep it running with no problems whatsoever.
OSD all working fine, Current & Voltage readings have been properly adjusted in Betaflight & are accurate (verified).
I'm using the mAh-reading in the OSD to determine when to land, so I'm relying on an accurate measure there.
As said, this has all been working perfectly well for over a year now. But there's this weird issue creeping up that the current readings are all over the place.
This makes me rely on the Voltage, which feels more like eyeballing it to me, though it seems to work for me as well.
Still, I would really like to understand the problem and maybe fix it.
The issue:
A couple of weeks ago, I noticed my mAh-readings were way too high. The same goes for the Amp-reading as they correlate. Now I started looking for patterns and what I found was:
- Sometimes, the current readings are about 8-10x higher than they should be, making the reading absolutely useless
- Sometimes, the current readings start off correctly, but suddenly get out of hand
- Sometimes, I even fly 2-3 packs in a row with the current reading being perfectly fine
What I kinda worked out already:
- The only issue seems to be the readout of the current sensor, as the quad is still flying exactly the same way it did before, all functionality seems to be given.
- I assume it must be hardware related. I verified the betaflight settings and, as stated, the readings are correct sometimes.
- To me, it feels very much related to the current sensor, but I'm lacking the expertise here.
- I checked the batteries in detail, there is no correlation. Flying the same battery, reading might work or it might not.
Now, the questions I have:
- Has anyone experienced a similar behaviour on their hardware, or can maybe even explain it?
- If the current sensor is the culprit, is there any way to fix it or do I need to get a new ESC-board?
- Could this be caused by some sort of short circuit somewhere on the board?
Soo, I hope I managed to give you the relevant information, if you need any more, just let me know.
I'd be happy about any inputs you guys can give me!
Thank you all in advance, all the best and stay healthy
![[-]](https://intofpv.com/images/collapse.png)
