ESP8266 Loader (Blynk er

https://www.instructables.com/id/Make-Blynk-Switch-IoT-4CH-Only-Use-Smartphone-ESP8/

A tool runs on Android platform to create an IoT project easy.
Makes it easy to binary file (result of compiled Arduino IDE) to any Expressif ESP8266 development board via USB OTG or WiFi (OTA).

Features:
★ /Flash bianry file via USB OTG
★ /Flash bianry file via WiFi (OTA)
★ any USB chip: CDC/ACM, FTDI, PL2303, CH34X and 210X
★ Serial Monitor for debuging
★ Change the Blynk token, SSID & automatically durring
★ No Ads (Pro version)
★ Access to Google Drive storage (Pro version)
★ Multiple widgets button (Pro version)

Note:
- Your device must USB Host OTG, otherwise the program will not work
- Use good quality OTG adapter/cable, otherwise the ing failure
- If you get error: "Failed . Check network connection." You can try to the required file manually from this link:
https://github.com/bluino/ESP8266Loader and https://github.com/bluino/ESP8266Loader_extra
then extract it to internal storage, so that you will have the /sdcard/ESP8266Loader folder.

Warning: Try it on your own risk, it can damage your hardware (Android or ESP board) or lead to data loss (binary file or any Android data).