So... I've recently set up one of these modules from DFRobot. I started
with their sample python code
and morphed into something that fits in my set of libraries. In my case, I
have it sending events out
via mqtt. A quick look at the code doesn't give any hints to help you.
>From the sample code, I set this up:
#I2C address
self.config['AS3935_I2C_ADDR1'] = 0x01
self.config['AS3935_I2C_ADDR2'] = 0x02
self.config['AS3935_I2C_ADDR3'] = 0x03
I think the hardware module has tiny switches to change it's address.
It's dead of winter here, so no lightning to detect for a few months. I
can share some of the code,
but not all.
Chris
On Friday, February 16, 2024 at 4:43:49 PM UTC-7 Pierre-Yves wrote:
> Finally, I succeeded to make the weewx running and capturing AS3935
> lightning detector data
>
> For that, I had to force the detection of the i2c addresses from 0x03 to
> 0x77 instead of 0x08 to 0x77 with the command:
> sudo i2cdetect -a -y 1 0x03 0x77
>
> I had also to add gpio to weewx group:
> sudo usermod -a -G gpio weewx
>
> PYB
> Le vendredi 16 février 2024 à 21:30:08 UTC+1, Pierre-Yves a écrit :
>
>> Hello All,
>>
>> Maybe a bit off-topic. But just in case someone would have faced to this
>> strange behavior of a Raspberry i2c address map.
>>
>>
>> Rpi4-1: usual address map from 0x03 to 7x76.
>> Config.:
>> Weewx 4.10.2,
>> Bresser 7in1,
>> sdr driver,
>> RTC clock (UU),
>> BME280 (0x76) (pressure, temperature, humidity)
>> AS3935 (0x03) (lightning detector)
>>
>> Weewx on Rpi4-1 running without any error.
>>
>> pi@weewx:~ $ sudo i2cdetect -y 1
>> 0 1 2 3 4 5 6 7 8 9 a b c d e f
>> 00: 03 -- -- -- -- -- -- -- -- -- -- -- --
>> 10: -- -- -- -- -- -- -- -- -- -- 1a -- -- -- -- --
>> 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
>> 70: -- -- -- -- -- -- 76 --
>> pi@weewx:~ $
>>
>> Rpi4-2: "abnormal" map with addresses 0x03 to 0x07 non selectable.
>> Config.:
>> Weewx 5.0.2,
>> Bresser 7in1,
>> RTC clock (UU),
>> AS3935 (??)
>>
>> Weewx on Rpi4-2 failing : File "/etc/weewx/bin/user/as3935.py", line 182,
>> in __init__GPIO.setup(self.pin, GPIO.IN (see log below)
>>
>> pi@raspberrypi:~ $ sudo i2cdetect -y 1
>> 0 1 2 3 4 5 6 7 8 9 a b c d e f
>> 00: -- -- -- -- -- -- -- --
>> 10: -- -- -- -- -- -- -- -- -- -- 1a -- -- -- -- --
>> 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>> 60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
>> 70: -- -- -- -- -- -- -- --
>> pi@raspberrypi:~ $
>>
>> Clearly, the AS3935 is not identified because the 0x03 to 0x07 address
>> range is not active. This AS3935 module works on the Rpi4-1
>>
>> Any idea on where this problem of misconfiguration could come from,
>> firmware, kernel ?
>> Is there a way to reset the I2c address map ?
>>
>> Thanks,
>>
>> Pierre-Yves
>>
>
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