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- Apr 16, 2009
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Rather than keep bugging @robsworld78 over email, I'll start doing in this forum for others to find. I recently have started having an issue where my reef-pi/robo-tank stopped recording pH. It was working fine, but then as of yesterday I'm getting no data points recorded. I've been on reef-pi 5.2, though as of a couple hours ago I'm on the latest built off main to get my other bugfixes in (it happened on 5.2 and continues now).
I'm wondering if this is a symptom of the probe dying, though the errors aren't very clear.
i2cdetect output
Error I see in the journalctl log
Note it ends with no text after Error, that's not a copy-paste issue
Config
None of this has changed recently, AFAIK.
Driver: Name=PH, type=ph-ezo, Address=99
Analog Input: Name=PH, Pin=0, Driver=PH
Sensor is a Bluelab pH probe off Amazon. Has been calibrated and was working well, as far as I know. Went from a smooth curve of 8.4-8.2 to suddenly yesterday dropping to 7.45 and now stopping.
I'm wondering if this is a symptom of the probe dying, though the errors aren't very clear.
i2cdetect output
pi@fragtankpi:~ $ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- 63 -- -- -- -- 68 -- -- -- -- -- -- --
70: 70 -- -- -- -- -- -- --
Error I see in the journalctl log
Note it ends with no text after Error, that's not a copy-paste issue
Jul 03 20:09:25 fragtankpi reef-pi[329]: 2022/07/03 20:09:25 ph sub-system: ERROR: Failed to read probe: PH Bluelab . Error: Failed to execute. Error:
Config
None of this has changed recently, AFAIK.
Driver: Name=PH, type=ph-ezo, Address=99
Analog Input: Name=PH, Pin=0, Driver=PH
Sensor is a Bluelab pH probe off Amazon. Has been calibrated and was working well, as far as I know. Went from a smooth curve of 8.4-8.2 to suddenly yesterday dropping to 7.45 and now stopping.