Raspberry-Pi-stuff/bme68x-only.py at main · alexjcoles/Raspberry-Pi-stuff · GitHub

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# List all the i2c devices by trying all the possible pins
import machine
from breakout_bme68x import BreakoutBME68X, STATUS_HEATER_STABLE
from breakout_bmp280 import BreakoutBMP280
import time

# TODO this could take a list of device IDs rather than just one hard coded


def find_sensors(device_id, controller, sda_pin_number, scl_pin_number):
    # print(f"About to scan with controller {controller} on SDA pin {sda_pin_number} and SCL pin {scl_pin_number}")
    sdaPIN = machine.Pin(sda_pin_number)
    sclPIN = machine.Pin(scl_pin_number)
    i2c = machine.I2C(controller, sda=sdaPIN, scl=sclPIN)
    devices_found = []

    devices = i2c.scan()
    if len(devices) != 0:
        # print('  Number of I2C devices found =', len(devices))
        for device in devices:
            # print("    Device Hexadecimal Address = ", hex(device))
            if device == device_id:
                # print("    Found a device with the right ID")
                devices_found.append({"controller": controller, "sda": sda_pin_number, "scl": scl_pin_number})
    return devices_found


# All the i2c interfaces on the Raspberry Pi Pico
# There's only 2 controllers but they can be on any of the pins
i2c_interfaces = [
                  {"controller": 0, "sda": 0, "scl": 1},
                  {"controller": 1, "sda": 2, "scl": 3},
                  {"controller": 0, "sda": 4, "scl": 5},
                  {"controller": 1, "sda": 6, "scl": 7},
                  {"controller": 0, "sda": 8, "scl": 9},
                  {"controller": 1, "sda": 10, "scl": 11},
                  {"controller": 0, "sda": 12, "scl": 13},
                  {"controller": 1, "sda": 14, "scl": 15},
                  {"controller": 0, "sda": 16, "scl": 17},
                  {"controller": 1, "sda": 18, "scl": 19},
                  {"controller": 0, "sda": 20, "scl": 21},
                  {"controller": 1, "sda": 26, "scl": 27},
                  ]
device_list = []
for interface in i2c_interfaces:
    new_ones = find_sensors(0x76, interface["controller"], interface["sda"], interface["scl"])
    print(new_ones)
    device_list.extend(new_ones)

# print("Found devices of interest", device_list)


# Initialize variables to store cumulative sensor data
cumulative_temperature = 0.0
cumulative_pressure = 0.0
cumulative_humidity = 0.0
cumulative_gas = 0.0

# Store the number of sensors
num_sensors = len(device_list)

while True:
    # Reset cumulative values for each iteration
    cumulative_temperature = 0.0
    cumulative_pressure = 0.0
    cumulative_humidity = 0.0
    cumulative_gas = 0.0

    # Loop through each sensor and collect data
    for sensor in device_list:
        i2c = machine.I2C(sensor["controller"], sda=machine.Pin(sensor["sda"]), scl=machine.Pin(sensor["scl"]))
        bme = BreakoutBME68X(i2c)
        # bmp = BreakoutBMP280(i2c)

        temperature, pressure, humidity, gas, status, _, _ = bme.read()

        # Sum up the data for averaging
        cumulative_temperature += temperature
        cumulative_pressure += pressure
        cumulative_humidity += humidity
        cumulative_gas += gas

        # Optional: Include the individual sensor status if needed for diagnostics
        # heater = "Stable" if status & STATUS_HEATER_STABLE else "Unstable"
        # print("Controller: {}, {:0.2f}c, {:0.2f}Pa, {:0.2f}%, {:0.2f} Ohms, Heater: {}".format(sensor["controller"], temperature, pressure, humidity, gas, heater))

    # Calculate the average for each parameter
    average_temperature = cumulative_temperature / num_sensors
    average_pressure = cumulative_pressure / num_sensors
    average_humidity = cumulative_humidity / num_sensors
    average_gas = cumulative_gas / num_sensors

    # Print out the average sensor data
    print("Pico 1, Average Sensor Data: {:0.2f}c, {:0.2f}Pa, {:0.2f}%, {:0.2f} Ohms".format(average_temperature, average_pressure, average_humidity, average_gas))

    # Wait for 1 second before the next loop
    time.sleep(1.0)