initial commit

LICENSE

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+This software may be redistributed under the terms of the GPL, LGPL, modified BSD, or Artistic license, or any of the other OSI approved licenses listed at http://www.opensource.org/licenses/alphabetical. Distribution is allowed under all of these licenses, or any smaller subset of multiple or just one of these licenses.
+
+When using a packaged version, please refer to the package metadata to see under which license terms it was distributed. Alternatively, a distributor may choose to replace the LICENSE section of the documentation and/or include a LICENSE file to reflect the license(s) they chose to redistribute under.

README

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+Stuurt bij het opstarten een printopdracht naar de printer en is dus bedoeld om
+te worden gebruikt in combinatie met een circuitje dat de ESP32 S2 aanzet en
+lang genoeg (ongeveer een seconde) aan houdt.
+
+Gemaakt voor een "S2 Mini".

main.cpp

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+#include <Arduino.h>
+#include <WiFi.h>
+#include <NTPClient.h>
+#include <WiFiUdp.h>
+
+WiFiUDP ntpUDP;
+
+IPAddress printer(10,42,8,10);
+IPAddress myip(10,42,8,9);
+IPAddress mymask(255,255,0,0);
+IPAddress gw(10,42,42,1);
+IPAddress ntp(10,42,42,1);
+IPAddress dns(10,42,42,1);
+NTPClient ntpclient(ntpUDP, ntp);
+
+void setup() {
+	Serial.begin(115200);
+	Serial.println("Hallo wereld!");
+	WiFi.config(myip, dns, gw, mymask);
+	WiFi.begin("revspace-pub", "");
+	setenv("TZ","CET-1CEST,M3.5.0/2,M10.5.0/3",1);
+	tzset();
+}
+
+void loop() {
+	while (WiFi.status() != WL_CONNECTED ) {
+		Serial.println("Connecting to WiFi...");
+		delay(10);
+	}
+	ntpclient.update();
+	unsigned long time = ntpclient.getEpochTime();
+
+	struct tm *ptm = localtime((time_t *) &time);
+
+	char date[11];
+	snprintf(date, sizeof(date), "%04d-%02d-%02d",
+		ptm->tm_year + 1900,
+		ptm->tm_mon + 1,
+		ptm->tm_mday
+	);
+
+	Serial.println("Connecting to printer...");
+
+	WiFiClient client;
+	if (client.connect(printer, 9100)) {
+		client.print("\eia"); client.write('\0');
+		client.print(
+			"\e@"
+			"\ea\x01"
+			"\ek\x0b"
+		);
+		client.print("\eX0\x43"); client.write('\0');
+		client.print("gratis meuk\n");
+		client.print("\eX0\x64"); client.write('\0');
+		client.print(date);
+		client.print("\f");
+		client.stop();
+		Serial.println("Date sent to printer.");
+	};
+
+	Serial.println("Halting.");
+
+	for(;;);
+}

platformio.ini

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+[platformio]
+src_dir = .
+
+[env]
+platform = https://github.com/platformio/platform-espressif32.git
+board = featheresp32-s2
+board_build.partitions = default.csv
+framework = arduino
+targets = upload
+monitor_speed = 115200
+lib_deps =
+    NTPClient
+
+[env:serial]
+upload_protocol = esptool
+