This mini-project sets up a Cheap Yellow Display as a ANSI-VT100 serial terminal. The terminal displays serial data from a microcontroller without the use of a PC, very convenient.
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An example display can be found at ESP32-2432S028. Above the USB-micro connector on the left, there is a 4-pin Rx/Tx connector thas also breaks out Vin/Gnd. The example display ships with the required cables to connect to it. Perfect.
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Some kind of case. I printed this case in PLA, which has the proper opening for the Rx/Tx connector.
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You need to replace the two small resistors right next to the Rx/Tx connector with a small piece of wire (like from a resistor, just 2mm), or a replacement 0-ohm resistor. I wasn't able to create reliable serial connections with the onboard 100Ohm! resistors; the replacements work reliably.
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Replace this line in the '.pio/libdeps/CYD/FabGL/src/network/ICMP.cpp' file:
- #include "WiFiGeneric.h", with
- #include "<path to user homefolder>/.platformio/packages/framework-arduinoespressif32/libraries/WiFi/src/WiFiGeneric.h"
or face errors during compilation. This is an issue with the FabGL library.
Using the supplied cable connected to JST connector P1 (Rx/Tx), connect
- VIN (RED cable) to a 5 volt power supply
- GND (Black cable) to common ground of the supply and your microcontroller
- RX (White cable) to the Tx PIN of your microcontroller. The RX pin is 3.3 volt, but also 5 volt tolerant.
- Set serial connection parameters on your microcontroller to 115200 baud, 8N1 (8 data bits, No parity bit, 1 stop bit)
