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@ -19,6 +19,8 @@ |
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// #define TINY_GSM_MODEM_SIM868
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// #define TINY_GSM_MODEM_SIM900
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// #define TINY_GSM_MODEM_SIM7000
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// #define TINY_GSM_MODEM_SIM7000SSL
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// #define TINY_GSM_MODEM_SIM7080
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// #define TINY_GSM_MODEM_SIM5360
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// #define TINY_GSM_MODEM_SIM7600
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// #define TINY_GSM_MODEM_UBLOX
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@ -63,10 +65,12 @@ SoftwareSerial SerialAT(2, 3); // RX, TX |
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#define TINY_GSM_DEBUG SerialMon
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// #define LOGGING // <- Logging is for the HTTP library
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// Add a reception delay - may be needed for a fast processor at a slow baud rate
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// Add a reception delay, if needed.
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// This may be needed for a fast processor at a slow baud rate.
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// #define TINY_GSM_YIELD() { delay(2); }
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// Define how you're planning to connect to the internet
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// Define how you're planning to connect to the internet.
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// This is only needed for this example, not in other code.
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#define TINY_GSM_USE_GPRS true
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#define TINY_GSM_USE_WIFI false
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@ -74,17 +78,17 @@ SoftwareSerial SerialAT(2, 3); // RX, TX |
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#define GSM_PIN ""
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// Your GPRS credentials, if any
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const char apn[] = "YourAPN"; |
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const char apn[] = "YourAPN"; |
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const char gprsUser[] = ""; |
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const char gprsPass[] = ""; |
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// Your WiFi connection credentials, if applicable
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const char wifiSSID[] = "YourSSID"; |
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const char wifiSSID[] = "YourSSID"; |
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const char wifiPass[] = "YourWiFiPass"; |
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// Server details
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const char server[] = "vsh.pp.ua"; |
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const int port = 80; |
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const int port = 80; |
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#include <TinyGsmClient.h>
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#include <CRC32.h>
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@ -103,16 +107,16 @@ const int port = 80; |
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#define TINY_GSM_USE_WIFI false
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#endif
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const char resource[] = "/TinyGSM/test_1k.bin"; |
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uint32_t knownCRC32 = 0x6f50d767; |
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uint32_t knownFileSize = 1024; // In case server does not send it
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const char resource[] = "/TinyGSM/test_1k.bin"; |
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uint32_t knownCRC32 = 0x6f50d767; |
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uint32_t knownFileSize = 1024; // In case server does not send it
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#ifdef DUMP_AT_COMMANDS
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#include <StreamDebugger.h>
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StreamDebugger debugger(SerialAT, SerialMon); |
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TinyGsm modem(debugger); |
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#include <StreamDebugger.h>
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StreamDebugger debugger(SerialAT, SerialMon); |
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TinyGsm modem(debugger); |
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#else
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TinyGsm modem(SerialAT); |
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TinyGsm modem(SerialAT); |
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#endif
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TinyGsmClient client(modem); |
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@ -144,9 +148,7 @@ void setup() { |
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#if TINY_GSM_USE_GPRS
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// Unlock your SIM card with a PIN if needed
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if ( GSM_PIN && modem.getSimStatus() != 3 ) { |
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modem.simUnlock(GSM_PIN); |
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} |
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if (GSM_PIN && modem.getSimStatus() != 3) { modem.simUnlock(GSM_PIN); } |
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#endif
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} |
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@ -162,7 +164,6 @@ void printPercent(uint32_t readLength, uint32_t contentLength) { |
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} |
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void loop() { |
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#if TINY_GSM_USE_WIFI
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// Wifi connection parameters must be set before waiting for the network
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SerialMon.print(F("Setting SSID/password...")); |
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@ -187,9 +188,7 @@ void loop() { |
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} |
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SerialMon.println(" success"); |
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if (modem.isNetworkConnected()) { |
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SerialMon.println("Network connected"); |
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} |
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if (modem.isNetworkConnected()) { SerialMon.println("Network connected"); } |
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#if TINY_GSM_USE_GPRS
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// GPRS connection parameters are usually set after network registration
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@ -202,9 +201,7 @@ void loop() { |
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} |
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SerialMon.println(" success"); |
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if (modem.isGprsConnected()) { |
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SerialMon.println("GPRS connected"); |
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} |
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if (modem.isGprsConnected()) { SerialMon.println("GPRS connected"); } |
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#endif
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SerialMon.print(F("Connecting to ")); |
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@ -226,15 +223,16 @@ void loop() { |
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SerialMon.println(F("Waiting for response header")); |
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// While we are still looking for the end of the header (i.e. empty line FOLLOWED by a newline),
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// continue to read data into the buffer, parsing each line (data FOLLOWED by a newline).
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// If it takes too long to get data from the client, we need to exit.
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// While we are still looking for the end of the header (i.e. empty line
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// FOLLOWED by a newline), continue to read data into the buffer, parsing each
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// line (data FOLLOWED by a newline). If it takes too long to get data from
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// the client, we need to exit.
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const uint32_t clientReadTimeout = 5000; |
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uint32_t clientReadStartTime = millis(); |
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String headerBuffer; |
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bool finishedHeader = false; |
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uint32_t contentLength = 0; |
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const uint32_t clientReadTimeout = 5000; |
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uint32_t clientReadStartTime = millis(); |
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String headerBuffer; |
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bool finishedHeader = false; |
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uint32_t contentLength = 0; |
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while (!finishedHeader) { |
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int nlPos; |
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@ -257,11 +255,9 @@ void loop() { |
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// SerialMon.print(' ');
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// Let's exit and process if we find a new line
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if (headerBuffer.indexOf(F("\r\n")) >= 0) |
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break; |
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if (headerBuffer.indexOf(F("\r\n")) >= 0) break; |
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} |
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} |
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else { |
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} else { |
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if (millis() - clientReadStartTime > clientReadTimeout) { |
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// Time-out waiting for data from client
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SerialMon.println(F(">>> Client Timeout !")); |
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@ -276,37 +272,42 @@ void loop() { |
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headerBuffer.toLowerCase(); |
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// Check if line contains content-length
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if (headerBuffer.startsWith(F("content-length:"))) { |
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contentLength = headerBuffer.substring(headerBuffer.indexOf(':') + 1).toInt(); |
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contentLength = |
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headerBuffer.substring(headerBuffer.indexOf(':') + 1).toInt(); |
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// SerialMon.print(F("Got Content Length: ")); // uncomment for
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// SerialMon.println(contentLength); // confirmation
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} |
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headerBuffer.remove(0, nlPos + 2); // remove the line
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} |
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else if (nlPos == 0) { |
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// if the new line is empty (i.e. "\r\n" is at the beginning of the line), we are done with the header.
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} else if (nlPos == 0) { |
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// if the new line is empty (i.e. "\r\n" is at the beginning of the line),
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// we are done with the header.
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finishedHeader = true; |
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} |
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} |
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// The two cases which are not managed properly are as follows:
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// 1. The client doesn't provide data quickly enough to keep up with this loop.
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// 2. If the client data is segmented in the middle of the 'Content-Length: ' header,
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// 1. The client doesn't provide data quickly enough to keep up with this
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// loop.
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// 2. If the client data is segmented in the middle of the 'Content-Length: '
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// header,
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// then that header may be missed/damaged.
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//
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uint32_t readLength = 0; |
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CRC32 crc; |
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CRC32 crc; |
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if (finishedHeader && contentLength == knownFileSize) { |
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SerialMon.println(F("Reading response data")); |
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clientReadStartTime = millis(); |
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printPercent(readLength, contentLength); |
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while (readLength < contentLength && client.connected() && millis() - clientReadStartTime < clientReadTimeout) { |
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while (readLength < contentLength && client.connected() && |
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millis() - clientReadStartTime < clientReadTimeout) { |
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while (client.available()) { |
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uint8_t c = client.read(); |
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//SerialMon.print(reinterpret_cast<char>c); // Uncomment this to show data
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// SerialMon.print(reinterpret_cast<char>c); // Uncomment this to show
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// 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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@ -338,14 +339,18 @@ void loop() { |
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float duration = float(timeElapsed) / 1000; |
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SerialMon.println(); |
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SerialMon.print("Content-Length: "); SerialMon.println(contentLength); |
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SerialMon.print("Actually read: "); SerialMon.println(readLength); |
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SerialMon.print("Calc. CRC32: 0x"); SerialMon.println(crc.finalize(), HEX); |
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SerialMon.print("Known CRC32: 0x"); SerialMon.println(knownCRC32, HEX); |
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SerialMon.print("Duration: "); SerialMon.print(duration); SerialMon.println("s"); |
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SerialMon.print("Content-Length: "); |
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SerialMon.println(contentLength); |
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SerialMon.print("Actually read: "); |
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SerialMon.println(readLength); |
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SerialMon.print("Calc. CRC32: 0x"); |
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SerialMon.println(crc.finalize(), HEX); |
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SerialMon.print("Known CRC32: 0x"); |
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SerialMon.println(knownCRC32, HEX); |
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SerialMon.print("Duration: "); |
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SerialMon.print(duration); |
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SerialMon.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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while (true) { delay(1000); } |
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} |
Sara Damiano
3 years ago