- Fri Oct 11, 2019 3:25 pm
martinayotte wrote:There must be a glitch somewhere...
It is hard for me to help you figure it out, since I have neither MFRC522 or SSD1306.
But I can say that I'm using a MCP23017 I2C GPIO Expander along with a SDCard on SPI, and they are working fine even if I used both of them in the same sketch.
Hi... Frist... Thanks.. I saw you make this forum be a great help for we, the newbies!!!!
I have the Idea to make a daily data logger, that send to internet the log of the day in a CSV format archive.
I search for the componets, and is the same you list here, and have the same problems with the I2C and SPI interfaces.
Can you give a sketch or wiring how I can use the SD card reader and the MCP23017?
Wich ESP8266 you use? I think to use the ESP-07 module.. because have a U.Fl Connector for external Antenna