MicroPython Forum (Archive)

Finally got it working with this simple code, if that can help someone : tca9548a_test.py import machine import ustruct scl_pin=22 sda_pin=21 class TCA9548A(): def __init__(self,address): self.address=address self.bus=machine.I2C(-1, machine.Pin(scl_pin), machine.Pin(sda_pin)) def switch_channel(sel...

I am trying to use a tca9548a to drive 2 temperature/humidity sensors (si7021) on an esp32 board, using the CircuitPython code (https://github.com/adafruit/Adafruit_CircuitPython_TCA9548A) and, i have no success so far. Here's what i have been doing so far : import machine import si7021 import tca95...

Oh yeah! i've missed that one

raspi3ua, did you try the code (esp8266_i2c_lcd.py and lcd.py) that i have posted on this thread on Sat Oct 01, 2016 2:36 am? NodeMCU is basically an esp8266 board so the code shall work. When using the two files mentioned above, you could try something like this (adjust the pins to your setup) : fr...

@ dwight.hubbard

Thanks for the pointer but I am already running the trigger on 5 volts.

@ deshipu

Thanks a lot for the suggestion.

I have tried using :

But it gives me exactly the same results.



Thanks again!

Hi list, I have been running an ultrasonic sensor on a raspberry pi for a while, with quite some good results. I wanted to port this on an esp8266 and, it looks like the result are a bit less accurate than on the pi. Here is the graphs usage of each one : pi : pi_hc-sr504.png esp8266 : esp8266_hc-sr...

Hi Electra,

Thank you so much for your kind (LCD) message!

You just made my day

Hi Electra, So sorry for the late reply. Here is the code, esp8266_i2c_lcd.py : """Implements a character based lcd connected via PCF8574 on i2c.""" from lcd import LcdApi from machine import I2C from time import sleep_ms DEFAULT_I2C_ADDR = 0x27 # Defines shifts or masks for the various LCD line att...

Yeah i was exactly thinking about this while i was at my second attempt to modify pyb_i2c_lcd.py but finally i took your advise and used bytes() in the end, which makes the code more cleaner i think.


Thanks again!

Cool! Thank you so much for the tip!

I have now a second, cleaner, working version!


Thanks again!