9 euros sur amazon.
voir article :
https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c
on a une version pythno3 du script
git clone https://github.com/switchdoclabs/SDL_Pi_HDC1080_Python3.git
et la commande
sudo i2cdetect -y 1
voir si c'est deja installé sur mon pi
troubleshooting
https://raspberrypi.stackexchange.com/questions/32719/i2cdetect-shows-every-possible-address/32720
donne qq tests rudimentaires à faire au multimetre
PAs transcendant
voir ici un code un peu différent - a base de ioctl
https://forums.raspberrypi.com/viewtopic.php?t=109135
le pb de base est que i2cdetect rien ...
piste ?
If you have a Meter/scope first check power on the pins of the device.
Is the correct power across the device pins and referenced to GND(0V) on
the Pi ?
Does the device accept true I2C signals with 3V3 pullups on Pi?
With power off measure the impedance between GND (0V) and the pin of the
device. Should be less than a few ohms probably less than an ohm.
If you have a scope check the waveforms while i2cdetect is running as
there should be a lot of I2C activity do the signal levels look right at
the pins of the device?
Then check software further.
une autre
https://stackoverflow.com/questions/42904712/i2c-not-detecting-issues-in-hardware-or-any-other
Disconnect everything from the expansion header and try wiringPi's pintest or pigpio's gpiotest.
on a ca aussi https://abyz.me.uk/rpi/pigpio/piscope.html
pour arduino qq indications
https://learn.adafruit.com/adafruit-hdc1008-temperature-and-humidity-sensor-breakout/wiring-and-test
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