Wednesday, March 9, 2016

ESP8266 ESP-01 Flash Firmware

I bought ESP8266 ESP-01 from It already flashed with AI Thinker firmware. I decided to use NodeMCU firmware. So here's how I do it.

1) Download NodeMCU Flasher (
2) Download NodeMCU Firmware ( I use nodemcu_float_0.9.6-dev_20150704.bin.
3) Run ESP8266Flasher.exe. Follow instruction below:-

Select The Right COM Port.

Select Firmware File.

Firmware File Selected.

Select The Right Baud Rate and Flash Size. 

Thursday, February 18, 2016

Dead Lenovo A850, Not Detected When Connected To PC

I have done FORMAT + DOWNLOAD A850 ROW rom to my Lenovo A850. But sadly, it is the wrong firmware. Supposed I need to select CN rom to my phone. After flashed ROW rom, the phone is dead = not detected by PC when connected with USB cable, no boot up.

So, I googled for solution, and found out with this link.

So, my solution based on those links is:-
1) Power off phone.
2) Press VOLUME UP + VOLUME DOWN while connecting USB cable to PC and phone.

Now the phone is detected by PC and I can flash another rom then.

Friday, February 5, 2016

GYM8511ML UV Sensor Connection To Arduino Nano

- This sensor is to detect 280-390nm light.
- I bought my sensor from E-Bay (, seller information "alice1101983".
- Nothing much info from seller's page. Googled and downloaded sample code from "".
- My connection shematic as below:-
- Hope this information helps.