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164 lines
4.3 KiB
164 lines
4.3 KiB
/**************************************************************
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*
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* For this example, you need to install CRC32 library:
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* https://github.com/vshymanskyy/CRC32.git
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* or from http://librarymanager/all#CRC32+checksum
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*
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* TinyGSM Getting Started guide:
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* http://tiny.cc/tiny-gsm-readme
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*
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**************************************************************/
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#include <TinyGsmClient.h>
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#include <CRC32.h>
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// Your GPRS credentials
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// Leave empty, if missing user or pass
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char apn[] = "YourAPN";
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char user[] = "";
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char pass[] = "";
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// Use Hardware Serial on Mega, Leonardo, Micro
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#define SerialAT Serial1
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// or Software Serial on Uno, Nano
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//#include <SoftwareSerial.h>
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//SoftwareSerial SerialAT(2, 3); // RX, TX
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TinyGsm modem(SerialAT);
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TinyGsmClient client(modem);
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char server[] = "cdn.rawgit.com";
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char resource[] = "/vshymanskyy/tinygsm/master/extras/test_10k.hex";
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uint32_t knownCRC32 = 0x54b3dcbf;
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uint32_t knownFileSize = 10240; // In case server does not send it
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void setup() {
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// Set console baud rate
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Serial.begin(115200);
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delay(10);
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// Set GSM module baud rate
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SerialAT.begin(115200);
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delay(3000);
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// Restart takes quite some time
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// You can skip it in many cases
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modem.restart();
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}
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void printPercent(uint32_t readLength, uint32_t contentLength) {
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// If we know the total length
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if (contentLength != -1) {
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Serial.print("\r ");
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Serial.print((100.0 * readLength) / contentLength);
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Serial.print('%');
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} else {
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Serial.println(readLength);
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}
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}
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void loop() {
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Serial.print("Waiting for network...");
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if (!modem.waitForNetwork()) {
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Serial.println(" fail");
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delay(10000);
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return;
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}
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Serial.println(" OK");
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Serial.print("Connecting to ");
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Serial.print(apn);
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if (!modem.gprsConnect(apn, user, pass)) {
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Serial.println(" fail");
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delay(10000);
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return;
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}
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Serial.println(" OK");
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Serial.print("Connecting to ");
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Serial.print(server);
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// if you get a connection, report back via serial:
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if (!client.connect(server, 80)) {
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Serial.println(" failed");
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delay(10000);
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return;
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}
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Serial.println(" OK");
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// Make a HTTP request:
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client.print(String("GET ") + resource + " HTTP/1.0\r\n");
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client.print(String("Host: ") + server + "\r\n");
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client.print("Connection: close\r\n\r\n");
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long timeout = millis();
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while (client.available() == 0) {
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if (millis() - timeout > 5000L) {
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Serial.println(">>> Client Timeout !");
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client.stop();
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delay(10000L);
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return;
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}
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}
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Serial.println("Reading response header");
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uint32_t contentLength = knownFileSize;
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while (client.available()) {
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String line = client.readStringUntil('\n');
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line.trim();
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//Serial.println(line); // Uncomment this to show response header
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line.toLowerCase();
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if (line.startsWith("content-length:")) {
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contentLength = line.substring(line.lastIndexOf(':') + 1).toInt();
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} else if (line.length() == 0) {
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break;
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}
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}
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Serial.println("Reading response data");
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timeout = millis();
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uint32_t readLength = 0;
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CRC32 crc;
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unsigned long timeElapsed = millis();
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printPercent(readLength, contentLength);
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while (readLength < contentLength && client.connected() && millis() - timeout < 10000L) {
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while (client.available()) {
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uint8_t c = client.read();
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//Serial.print((char)c); // Uncomment this to show data
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crc.update(c);
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readLength++;
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if (readLength % (contentLength / 13) == 0) {
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printPercent(readLength, contentLength);
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}
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timeout = millis();
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}
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}
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printPercent(readLength, contentLength);
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timeElapsed = millis() - timeElapsed;
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Serial.println();
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client.stop();
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Serial.println("Server disconnected");
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modem.gprsDisconnect();
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Serial.println("GPRS disconnected");
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Serial.println();
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float timeSpent = float(timeElapsed) / 1000;
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float theorLimit = ((8.0 * readLength) / 85.6) / 1000;
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Serial.print("Content-Length: "); Serial.println(contentLength);
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Serial.print("Actually read: "); Serial.println(readLength);
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Serial.print("Calc. CRC32: 0x"); Serial.println(crc.finalize(), HEX);
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Serial.print("Known CRC32: 0x"); Serial.println(knownCRC32, HEX);
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Serial.print("Time spent: "); Serial.print(timeSpent); Serial.println("s");
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Serial.print("85.6kBps limit: "); Serial.print(theorLimit); Serial.println("s");
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// Do nothing forevermore
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while (true) {
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delay(1000);
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}
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}
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