Currently, I am doing a project to display four parameters in four 4digit 7 segments LED display via MCP23017 I/O expander by I2c communication from the esp8266 controller. By the reference of this forum, I get the code of single 4 digits 7 segments through mcp23017. Now I’m facing brightness and flickering problem by my code. Suggest me some ideas to complete this project.
final2.ino (20.9 KB)