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I want to read the data from a Pimoroni LTR-559 sensor but it only returns None in the code.

Here is the code:

import time
from pimoroni_i2c import PimoroniI2C
from breakout_ltr559 import BreakoutLTR559
PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}

i2c = PimoroniI2C(sda = 4, scl = 5)
ltr = BreakoutLTR559(i2c)
while True:
    reading = ltr.get_reading()
    print(reading)
    if reading is not None:
        print("Lux:", reading[BreakoutLTR559.LUX], "Prox:", reading[BreakoutLTR559.PROXIMITY])
   
    time.sleep(0.1)

and for the pinout:

| Pico        | LTR559|
| --------    | -------------- |
| 3V3(Pin36)  | Power          |
| GND (Pin38) | GND            |
| SDA1 (Pin4) | SDA            |
| SCL1 (Pin5) | SCL            |

I ignored the int pin because I don't think it's necessary, is that the issue or did I get something else wrong?

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  • \$\begingroup\$ Does it work if you read the device ID with print(ltr.part_id())? Also, have you try PimoroniI2C(**PINS_BREAKOUT_GARDEN)? \$\endgroup\$ Commented Apr 29 at 13:33
  • \$\begingroup\$ You can ignore the INT pin for basic reading, so that’s not the direct problem — however, the LTR559 uses interrupt-driven updates, so some library versions won't return data unless an interrupt has triggered. \$\endgroup\$ Commented Apr 29 at 14:57

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