MicroPython Forum

Thanks a lot for writing and sharing this driver! Excellent interface.

one minor suggestion is to dynamically concatenate strings in the loop with .format rather than "+". You garbage collect at the end of the loop so it's doubtful this will help, if at all...described here:

http://docs.micropython.org/en/latest/w ... ained.html

Based on your observations I think this post might help you: https://forum.micropython.org/viewtopic.php?f=16&t=2625&hilit=flash+size+esptool I suggest also to flash with 115200 BAUD Here is how I use esptool to flash micropython esptool.py --port COMx erase_flash esptool.py --port COMx --baud 11520...

A small contribution to help find root cause .... I see normal rtc operation with a Feather esp8266 and the micropython 1.8.6 release. I'm using the same urtc library. Perhaps try with this micropython release? here is the REPL trace: MicroPython v1.8.6-7-gefd0927 on 2016-11-10; ESP module with ESP8...

Most Excellent ! Many thanks @dhylands, @mcauser, and @ernitron. :D I've wanted to get these displays working with esp/uP for some time now. I put a level shifter in the mix as it's likely the i2c lines are pulled to 5V on the LCD backpack which might put the ESP at risk. Not sure that is really nee...

I downloaded and installed the binary version you are using and tried it. For some reason I can't reproduce the issue that you see. It looks OK on my Feather Huzzah both from the REPL and WebREPL WebREPL daemon started on ws://192.168.4.1:8266 WebREPL daemon started on ws://0.0.0.0:8266 Started webr...

One thought -- is your ESP running a micropython binary release that includes the MQTT library?

I have used MQTT with two binaries, where the MQTT library is built-in:
esp8266-20160909-v1.8.4.bin
esp8266-20161110-v1.8.6.bin

I've been learning how to use MQTT with two free hobbyist cloud data services. The MQTT protocol is supported in a built-in library in the Micropython binaries -- this protocol can be used send data from your ESP8266, over WIFI, to a free cloud database. For example, your ESP board could read an I2C...