Hi,
I guess the i2c adress 0x27 did not work, and that 0x3f was from sudo i2cdetect -y 1.
Other than that everything in the configuration seems good for a 20x4 LCD with i2c interface.
I assume the connections are correct (sda connected to physical pin 3 and scl connected to physical pin 5).
What about the docker, I assume it was installed correctly, with towards the end of the installation several packages being downloaded and extracted.
If nothing works, let me know, I will try to do again an installation from scratch since I happen to have the same display.
Remy
I guess the i2c adress 0x27 did not work, and that 0x3f was from sudo i2cdetect -y 1.
Other than that everything in the configuration seems good for a 20x4 LCD with i2c interface.
I assume the connections are correct (sda connected to physical pin 3 and scl connected to physical pin 5).
What about the docker, I assume it was installed correctly, with towards the end of the installation several packages being downloaded and extracted.
If nothing works, let me know, I will try to do again an installation from scratch since I happen to have the same display.
Remy