SPI on nodeMCU not running
Posted: Thu Jul 21, 2016 10:02 amHey together,
I'm really stuck in my current project. I want to connect a 16x2 LCD display on my nodeMCU with SPI and a shift register (74HC595). To achieve that, I followed the instructions from this page:
http://playground.arduino.cc/Main/LiquidCrystal
If I connect my arduino UNO, everything works out of the box without any problem. But If I replace the arduino with my nodeMCU (1.0, programmed with the Arduino IDE), nothing happens on my LCD.
Can anyone please tell me, if:
- SPI is available on non-lua programmed nodeMCU
- SPI needs to be some kind of activated
I connected the shift register on the following PINS:
- clock: D5
- mosi: D7
- SS/Latch: D2
Tha latch pin (which is controlled by the LiquidCrystal library directly) seems to work, if I place some delay()s in the library code, I can see a LED flickering.
I really hope that you have a hint for me. I would be really glad and you would definitely secure a beer or glass of juice from me because I tried so many things and nothing worked
Thank you and kind regards,
Tobias
I'm really stuck in my current project. I want to connect a 16x2 LCD display on my nodeMCU with SPI and a shift register (74HC595). To achieve that, I followed the instructions from this page:
http://playground.arduino.cc/Main/LiquidCrystal
If I connect my arduino UNO, everything works out of the box without any problem. But If I replace the arduino with my nodeMCU (1.0, programmed with the Arduino IDE), nothing happens on my LCD.
Can anyone please tell me, if:
- SPI is available on non-lua programmed nodeMCU
- SPI needs to be some kind of activated
I connected the shift register on the following PINS:
- clock: D5
- mosi: D7
- SS/Latch: D2
Tha latch pin (which is controlled by the LiquidCrystal library directly) seems to work, if I place some delay()s in the library code, I can see a LED flickering.
I really hope that you have a hint for me. I would be really glad and you would definitely secure a beer or glass of juice from me because I tried so many things and nothing worked
Thank you and kind regards,
Tobias