When I enlarge the text on the ST7789 TFT so that I can tead it 4-5 feet away, the text come out looking very blocky. Here is a photo of the TFT display in Arduino IDE with the Text
Here is the same display using CircuitPython and bitmap (.bdf) fonts:
Does anyone know how to display (.bdf) fonts in Arduino IDE?
Thanks in advance for the help.
Here is my code:
#include <WiFi.h>
#include <HTTPClient.h>
#include <Adafruit_SHT4x.h>
#include <Adafruit_MAX1704X.h>
#include <Adafruit_NeoPixel.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>
#include <time.h>
#include "sntp.h" // included with Arduino ESP32 package
#include <Wire.h>
#include <SPI.h>
#include <ArduinoJson.h>
// --- Configuration ---
const char* ssid = "Pelican1";
const char* password = "Aquadesiac";
const char* serverUrl = "192.168.1.149";
const int port = 3000;
const char* ntpServer1 = "pool.ntp.org";
const char* ntpServer2 = "time.nist.gov";// more than one can be used
const char* TZ_PST = "PST8PDT,M3.2.0,M11.1.0"; // TimeZone rule for Los Angeles including daylight adjustment rules
float cellVoltage = 0.00000;
uint8_t siz = 3;
char buf [15];
char timeStringBuff [50];
char dateStringBuff [50];
char batv [15];
char tempFs [5];
char humPs [10];
float tempF = 0;
float humP = 0;
int_fast64_t start = 0;
// --- Hardware Pins (Specific to ESP32-S3 TFT boards) ---
#define TFT_I2C_POWER 7 // Pin to enable I2C and Screen Power
// --- Objects ---
Adafruit_SHT4x sht4 = Adafruit_SHT4x();
Adafruit_MAX17048 maxlipo;
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
void setup() {
Serial.begin(115200);
// turn on the TFT / I2C power supply
Serial.println("Init TFT");
pinMode(TFT_I2C_POWER, OUTPUT);
digitalWrite(TFT_I2C_POWER, HIGH);
delay(10);
pinMode(TFT_BACKLITE, OUTPUT);
digitalWrite(TFT_BACKLITE, HIGH);
tft.init(135, 240); // Standard ESP32-S3 TFT resolution
tft.setRotation(3);
tft.fillScreen(ST77XX_BLACK);
Serial.println("TFT Initialized");
// 3. Initialize I2C and Sensors
Wire.begin();
if (!maxlipo.begin())
{
Serial.println("MAX17048 not found");
}
maxlipo.setAlertVoltages(3.0, 4.2);
Serial.println("Adafruit SHT4x test");
if (! sht4.begin()) {
Serial.println("Couldn't find SHT4x");
while (1) delay(1);
}
Serial.println("Found SHT4x sensor");
Serial.print("Serial number 0x");
Serial.println(sht4.readSerial(), HEX);
// You can have 3 different precisions.
sht4.setPrecision(SHT4X_HIGH_PRECISION);
sht4.setHeater(SHT4X_NO_HEATER);
//connect to WiFi
Serial.printf("Connecting to %s ", ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.print("WiFi CONNECTED IP: "); //set the SNTP update time interval
Serial.println(WiFi.localIP());
sntp_servermode_dhcp(1); // (optional)
sntp_set_time_sync_notification_cb( timeavailable );// tiggers function timeavailable when SNTP update has taken place
sntp_set_sync_interval(60*60*1000); //set time period after which a snpt server request for time update is made.
configTzTime(TZ_PST, ntpServer1);
}
void loop() {
start = millis();
simpleRead();
drawtext1(tempFs);
drawtext2(humPs);
printLocalTime();
drawtext3(timeStringBuff);
ReadBattery();
drawtext5(batv);
PostData();
int intv =(millis() - start);
delay((30 * 60 * 1000) - intv); // 1hr Loop
}
void drawtext1(char *text) {
tft.setCursor(0, 0);
tft.setTextColor(ST77XX_RED, ST77XX_BLACK);
tft.setTextWrap(true);
tft.setTextSize(5);
tft.print(text);
tft.print("F");
}
void drawtext2(char *text) {
tft.setCursor(110, 0);
tft.setTextColor(ST77XX_GREEN, ST77XX_BLACK);
tft.setTextWrap(true);
tft.setTextSize(5);
tft.print(text);
tft.print("%");
}
void drawtext3(char *text) {
tft.setCursor(0, 50);
tft.setTextColor(ST77XX_BLUE, ST77XX_BLACK);
tft.setTextWrap(true);
tft.setTextSize(4);
tft.print(text);
}
void drawtext4(char *text) {
tft.setCursor(0, 100);
tft.setTextColor(ST77XX_ORANGE, ST77XX_BLACK);
tft.setTextWrap(true);
tft.setTextSize(siz);
tft.print(text);
}
void drawtext5(char *text) {
tft.setCursor(0, 95);
tft.setTextColor(ST77XX_ORANGE, ST77XX_BLACK);
tft.setTextWrap(true);
tft.setTextSize(siz);
tft.print(text);
}
void timeavailable(struct timeval *t)
{
Serial.println("Got time adjustment from NTP!");
//Put any code in here that you want executed when NTP updates
//e.g.
//printLocalTime();
}
void printLocalTime()// routine to get the local time and print it in day date and time format
{
struct tm timeinfo; // used to strore the latest time/date information used with time.h functions
// function to get the system time and print it in date and time format
if(!getLocalTime(&timeinfo)){
Serial.println("No time available (yet)");
return;
}
// Serial.print("Local Time: ");Serial.println(&timeinfo, "%Y-%B-%d, %H:%M:%S");
strftime(timeStringBuff, sizeof(timeStringBuff), "%H:%M:%S", &timeinfo);
strftime(dateStringBuff, sizeof(dateStringBuff), "%Y-%b-%d %H:%M:%S", &timeinfo);
}
void simpleRead ()
{
sensors_event_t humidity, temp;
sht4.getEvent(&humidity, &temp);
tempF = (temp.temperature * 9.0 / 5.0) + 32.0;
dtostrf(tempF, 3, 0, tempFs);
humP = (humidity.relative_humidity);
dtostrf(humP, 3, 0, humPs);
}
void ReadBattery()
{
int i = 0;
while (i < 3) {
cellVoltage = maxlipo.cellVoltage();
if (isnan(cellVoltage)) {
Serial.println("Failed to read cell voltage, check battery is connected!");
delay(500);
return;
}
i++;
}
dtostrf(cellVoltage, 1, 3, batv);
strcat(batv, " Volts");
}
void PostData()
{
if (WiFi.status() == WL_CONNECTED) {
HTTPClient http;
// Construct the full URL: http://IP:PORT/PATH
String serverPath = "http://" + String(serverUrl) + ":" + String(port) + "api/data";
http.begin(serverPath);
http.addHeader("Content-Type", "application/json");
// Prepare JSON payload
JsonDocument doc;
doc["timestamp"] = dateStringBuff;
doc["temperature"] = tempF;
doc["humidity"] = humP;
doc["batvolts"] = cellVoltage;
String jsonPayload;
serializeJson(doc, jsonPayload);
//Send post request.
int httpResponseCode = http.POST(jsonPayload);
if (httpResponseCode != 0) {
Serial.print("HTTP Response code: ");
Serial.println(httpResponseCode);
String payload = http.getString();
Serial.println("Response: " + payload);
} else {
Serial.print("Error code: ");
Serial.println(httpResponseCode);
}
http.end(); // Free resources
} else {
Serial.println("HTTP Disconnected");
}
}
