Flowcode Support Board

Hi
Question about the module:
Estardyn 2.0 Inch TFT LCD Display with Rotary Encoder EC11.
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Cannot find some documentation about this module on net.
AI says that module should use the ST7789_driver.
Not sure if I have to use (for Nano) the level shifter (5v to 3.3v).
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GND: Ground connection.
VDD: Power supply input (typically 3.3V or 5V, depending on the specific display controller and voltage regulator on board. Consult module documentation or test with 3.3V first).
SCL: I2C Clock line for the display.
SDA: I2C Data line for the display.
RES: Reset pin for the TFT display. Connect to a digital output pin on your microcontroller.
DC: Data/Command pin for the TFT display. Connect to a digital output pin on your microcontroller.
BLK: Backlight control pin. Connect to a digital output pin for backlight on/off control, or to a PWM pin for brightness adjustment.
TRA: Rotary Encoder Channel A output. Connect to a digital input pin on your microcontroller.
TRB: Rotary Encoder Channel B output. Connect to a digital input pin on your microcontroller.
PSH: Push Button output for the rotary encoder. Connect to a digital input pin on your microcontroller.
KO: Encoder Common or additional output pin. This pin's function can vary; it may be a common ground for the encoder or an additional signal. Consult specific examples for its usage.
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Any help, please?

Hi Viktor

The rotary encoder is most likely to be the same as the Quadrature Encoder found in Flowcode (Inputs). I'd be very surprised if it were not. Allocate pins for A/B and also push-button and off you go.

I'll have a look at display / I2C / levels a little later.

Regards

Hi

Best I can find on the module is here

https://www.aliexpress.com/item/1005012 ... cification

There are some conflicting sites but generally most suggest it is 3.3v operation (but I do see what looks to be a regulator on it so.....).

Is your Nano 5v or the newer 3.3v? Newer chips are marked Nano 33 on top of chip. If it does not state that then assume it is 5v.

Encoder appears to be connected to the module's VCC being pulled Low, so it can connect directly to any Nano as a 5v Nano will happily accept 3.3v from module.

You can check the above with a multimeter. Do note that similar encoders from cheap sources have an incredible amount of bounce and frequently are open circuit..... Cheap for a reason.

If using a 5v Nano you will need to level shift any control signals from Nano to module.

Regards

Hi

FC supports the ST7789 as a display. Select that and in Properties set USE SPI to No. This should then bring up a list of connections that are very similar to those documented in your post.

Hope the above has helped.

Regards

Thanks for the quick answer.
Nano is 5v.
Looks like I need the level shifter.
Have checked the net as I have a cheap 4 chn module.
It is not recommended for SPI.
People recommend TxB0108.
I remember Jorgen has raised the question about the ST7789 driver in FC8 forum.
If this Estardyn module has the ST7789 driver - my life is easy.
Thanks.