MicroPython Forum (Archive)

The D1 mini has a 5V line, but uses 3V3 logic, so you'll need to use a voltage divider for the Echo pin. Here's an example of how to do it with a Raspberry Pi It seems ernitron is right about the current draw being the limiting factor. HC-SR04 has a working current of 15mA but the ESP8266 maximum s...

mcauser wrote:@orsisam paste your git repo when it's ready and I'll help you test it on some of my D1 minis.

I haven't post to Github for the code, but I share the code here.

Thanks for pythoncoder to help me understood the code. Thanks for skgsergio to share the code on Github: https://github.com/skgsergio/MicropythonLibs Finally yesterday I success to modify the code to work with esp8266, I am testing using Wemos D1 Mini board. So, maybe it will compatible with all esp...

Porting that code should be very easy. It was probably written before the utime module provided microsecond level timing. The sleep_us, ticks_us and ticks_diff functions mean that there's no need to use a timer counter. Use sleep_us to time the initial 10us pulse, record ticks_us, loop waiting for ...

Hi,

I want to create a water-level project using Wemos D1 Mini, but I don't find right module for HC-SR04 ultrasonic sensor. I found one here https://github.com/skgsergio/MicropythonLibs.git, but it is used for Pyboard. If someone has porting this code to esp8266?

@platforma I found the little OLED shield a little too tiny at only 64x48. Beautiful display, but doesn't fit many words. If you are considering ordering the DHT11/22 shield, get the Dual Base shield to avoid the ESP8266 warming up the sensor and skewing the results. There are not any WeMos shields...

Can You tell me how to find the i2c address using micropython? The simple way is to use the I2C.scan() method see: http://docs.micropython.org/en/latest/pyboard/library/pyb.I2C.html#pyb.I2C.scan How to use this function? I've tried but failed. I tried this code from machine import I2C I2C.scan() bu...

[quote="dhylands"]I wrote a [url=https://github.com/dhylands/python_lcd]python library[/url] which talks to an HD44780 based display which is connected over i2c. This was for the BeagleBoneBlack, and used an LCD module similar to [url=http://arduino-info.wikispaces.com/LCD-Blue-I2C]this one[/url] Th...

[quote="SpotlightKid"]There is no pin with number 3 on esp8266 boards. Available pins are: 0, 2, 4, 5, 12, 13, 14, 15, 16. On the Pyboard and the WiPy you can use [code]import pb pyb.Pin.board[/code] to see what pins are available, but, alas, on the esp8266 port [i]machine.Pin[/i] has no such attrib...