External libraries and I2C via UIFLOW
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It would be really to nice to have a tutorial using I2C blocks of UIFLOW and using external I2C devices. I tried to get readings from Adafruit BNO055 using execute block but just receive errors.
Did anyone try to connect a non M5STACK I2C sensor via UIFLOW ? -
I wanted to know the same thing. I just received this one from Seed Studio that I’m trying to get working with uiFlow.
https://www.seeedstudio.com/Grove-I2C-Mini-Motor-Driver-p-2508.html
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@hetzer said in External libraries and I2C via UIFLOW:
It would be really to nice to have a tutorial using I2C blocks of UIFLOW and using external I2C devices. I tried to get readings from Adafruit BNO055 using execute block but just receive errors.
Did anyone try to connect a non M5STACK I2C sensor via UIFLOW ?Yes and I did get some limited success but haven't had the time to continue work on it.
I2c works a bit funny in the latest versions of uiflow and takes some getting used to.
It takes a combination of uiflow blocks and micropython hacking to get things to talk.@world101 said in External libraries and I2C via UIFLOW:
I wanted to know the same thing. I just received this one from Seed Studio that I’m trying to get working with uiFlow.
https://www.seeedstudio.com/Grove-I2C-Mini-Motor-Driver-p-2508.html
That looks useful
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I have also been trying myself many times to interface with an I2C device and was only once successful with a sevseg display from seeed. This was back before we switched back to the main micropython branch and now I2C seems completely broken for anything other than M5Stack devices. If i use commands from the micropython 11.1 documentation I always get bus error, here is the precious little information about I2C commands in the latest UIflow firmware.
import i2c_bus # port i2c_bus.PORTA, i2c_bus.PORTB or (sda, scl) i2c1 = i2c_bus.easyI2C(port, addr) i2c1.write_u8(reg, data) # byteorder: 'big' or 'little' i2c1.write_u16(reg, data, byteorder='big') # data = i2c1.read_u8(reg): # byteorder: 'big' or 'little' data = i2c1.read_u16(reg, byteorder='big') # data is bytes data = i2c1.read(num) # state: True or False state = i2c1.available() # addrList is a available addr list addrList = i2c1.scan() -
I read Sipeed Grove i2c sensor from m5stick C like this
from m5stack import * from m5ui import * from uiflow import * import i2c_bus i2c1 = i2c_bus.easyI2C(i2c_bus.PORTA, 0x45) i2c1.write_u8(0x24, 0x00) time.sleep(0.016) data = i2c1.read(6) temperature = data[0] * 256 + data[1] celsius = -45 + (175 * temperature / 65535.0) humidity = 100 * (data[3] * 256 + data[4]) / 65535.0 lcd.print(celsius,0,5,0xffffff) lcd.print(humidity,0,20,0xffffff) -
@jvmo said in External libraries and I2C via UIFLOW:
i2c1.write_u8(0x24, 0x00)
Thanks for the sample code. I am trying to use UIFlow to write a program running on M5Stack Core on the BTC Base with DHT12 sensor. I found it kept reading wrong data until the i2c1.write_u8(0x24, 0x00) sentence in your code inspired me.
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@robinkam Could you post the micropython code for it?
That would be great, because I can't get it to work.
