Adafruit STEMMA Soil Sensor driver

[marcidy]

You can draw a schematic, even in MS paint (though vector based drawing is much better). A schematic is just a visual representation of the circuit so we can talk about it. It's clearly available, you just haven't produced it yet

Is the power supply adequate? How are you powering it, and how much current can the 5v supply deliver?

Do you have pull-up resistors on SDA/SCL? If not, you can try:

Code: Select all

i2c = machine.I2C(sda=machine.Pin(SDA_PIN, pull=machine.pin.PULL_UP), scl=machine.Pin(SCL_PIN, pull=machine.Pin.PULL_UP), freq=400000)

Does the soil sensor run at 400kHz?

[dhust]

You can draw a schematic, even in MS paint (though vector based drawing is much better). A schematic is just a visual representation of the circuit so we can talk about it. It's clearly available, you just haven't produced it yet

Is the power supply adequate? How are you powering it, and how much current can the 5v supply deliver?

Do you have pull-up resistors on SDA/SCL? If not, you can try:

Code: Select all

i2c = machine.I2C(sda=machine.Pin(SDA_PIN, pull=machine.pin.PULL_UP), scl=machine.Pin(SCL_PIN, pull=machine.Pin.PULL_UP), freq=400000)

Does the soil sensor run at 400kHz?

I understand that I can draw a schematic. It would just literally be 4 lines with the same information I provided before: ground to ground, vin to 5V or 3.3V, SDA to D2 (GPIO4: SDA), and SCL to D1 (GPIO5: SCL). The power supply is the USB power, which is 5 volts.

According to the specs of the soil sensor their SDA and SDC pins have a 10k pullup to VIN.

I'm not sure if it runs at 400kHz. The scan() I used doesn't look like it needs that and it didn't end up finding anything.