General cleanup and refactoring in preparation for batch transmission

ChangeLog.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Changed
+- **BREAKING** Refactored how the publisher transmit buffer works. This will require adjustment to custom data publishers.
 
 ### Added
 

src/LoggerBase.cpp

@@ -305,25 +305,11 @@ bool Logger::syncRTC() {
             PRINTOUT(F("Could not wake modem for clock sync."));
         }
         watchDogTimer.resetWatchDog();
-        // Power down the modem - but only if there will be more than 15 seconds
-        // before the NEXT logging interval - it can take the modem that long to
-        // shut down
-
-        uint32_t setupFinishTime = getNowLocalEpoch();
-        if (setupFinishTime % (_loggingIntervalMinutes * 60) > 15) {
-            MS_DBG(F("At"), formatDateTime_ISO8601(setupFinishTime), F("with"),
-                   setupFinishTime % (_loggingIntervalMinutes * 60),
-                   F("seconds until next logging interval, putting modem to "
-                     "sleep"));
-            _logModem->disconnectInternet();
-            _logModem->modemSleepPowerDown();
-        } else {
-            MS_DBG(F("At"), formatDateTime_ISO8601(setupFinishTime),
-                   F("there are only"),
-                   setupFinishTime % (_loggingIntervalMinutes * 60),
-                   F("seconds until next logging interval; leaving modem on "
-                     "and connected to the internet."));
-        }
+
+        // Power down the modem now that we are done with it
+        MS_DBG(F("Powering down modem after clock sync."));
+        _logModem->disconnectInternet();
+        _logModem->modemSleepPowerDown();
     }
     watchDogTimer.resetWatchDog();
     return success;
@@ -1053,12 +1039,10 @@ bool Logger::initializeSDCard(void) {
 
 // Protected helper function - This sets a timestamp on a file
 void Logger::setFileTimestamp(File fileToStamp, uint8_t stampFlag) {
-    fileToStamp.timestamp(stampFlag, dtFromEpoch(getNowLocalEpoch()).year(),
-                          dtFromEpoch(getNowLocalEpoch()).month(),
-                          dtFromEpoch(getNowLocalEpoch()).date(),
-                          dtFromEpoch(getNowLocalEpoch()).hour(),
-                          dtFromEpoch(getNowLocalEpoch()).minute(),
-                          dtFromEpoch(getNowLocalEpoch()).second());
+    DateTime dt = dtFromEpoch(getNowLocalEpoch());
+
+    fileToStamp.timestamp(stampFlag, dt.year(), dt.month(), dt.date(),
+                          dt.hour(), dt.minute(), dt.second());
 }
 
 

src/LoggerModem.cpp

@@ -394,31 +394,16 @@ float loggerModem::getModemTemperature() {
 
 // Helper to get approximate RSSI from CSQ (assuming no noise)
 int16_t loggerModem::getRSSIFromCSQ(int16_t csq) {
-    int16_t CSQs[33]  = {0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10,
-                         11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
-                         22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 99};
-    int16_t RSSIs[33] = {-113, -111, -109, -107, -105, -103, -101, -99, -97,
-                         -95,  -93,  -91,  -89,  -87,  -85,  -83,  -81, -79,
-                         -77,  -75,  -73,  -71,  -69,  -67,  -65,  -63, -61,
-                         -59,  -57,  -55,  -53,  -51,  0};
-    for (uint8_t i = 0; i < 33; i++) {
-        if (CSQs[i] == csq) return RSSIs[i];
-    }
-    return 0;
+    if ((csq < 0) || (csq > 31)) return 0;
+    // equation matches previous table. not sure the original motivation.
+    return ((csq * 2) - 113);
 }
 
 // Helper to get signal percent from CSQ
 int16_t loggerModem::getPctFromCSQ(int16_t csq) {
-    int16_t CSQs[33] = {0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10,
-                        11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
-                        22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 99};
-    int16_t PCTs[33] = {0,  3,  6,  10, 13, 16, 19, 23, 26, 29,  32,
-                        36, 39, 42, 45, 48, 52, 55, 58, 61, 65,  68,
-                        71, 74, 78, 81, 84, 87, 90, 94, 97, 100, 0};
-    for (uint8_t i = 0; i < 33; i++) {
-        if (CSQs[i] == csq) return PCTs[i];
-    }
-    return 0;
+    if ((csq < 0) || (csq > 31)) return 0;
+    // equation matches previous table. not sure the original motivation.
+    return (csq * 827 + 127) >> 8;
 }
 
 // Helper to get signal percent from RSSI

src/VariableBase.cpp

@@ -228,7 +228,8 @@ bool Variable::checkUUIDFormat(void) {
     int first_invalid = strspn(_uuid, acceptableChars);
     if (first_invalid != 36) {
         MS_DBG(F("UUID for"), getVarCode(), '(', _uuid, ')',
-               F("has a bad character"), _uuid[first_invalid], F("at"), first_invalid);
+               F("has a bad character"), _uuid[first_invalid], F("at"),
+               first_invalid);
         return false;
     }
     return true;

src/dataPublisherBase.cpp

@@ -10,7 +10,9 @@
  */
 #include "dataPublisherBase.h"
 
-char dataPublisher::txBuffer[MS_SEND_BUFFER_SIZE] = {'\0'};
+char    dataPublisher::txBuffer[MS_SEND_BUFFER_SIZE];
+Client* dataPublisher::txBufferOutClient = nullptr;
+size_t  dataPublisher::txBufferLen;
 
 // Basic chunks of HTTP
 const char* dataPublisher::getHeader  = "GET ";
@@ -21,19 +23,16 @@ const char* dataPublisher::hostHeader = "\r\nHost: ";
 // Constructors
 dataPublisher::dataPublisher() {}
 
-dataPublisher::dataPublisher(Logger& baseLogger, uint8_t sendEveryX,
-                             uint8_t sendOffset)
+dataPublisher::dataPublisher(Logger& baseLogger, int sendEveryX)
     : _baseLogger(&baseLogger),
-      _sendEveryX(sendEveryX),
-      _sendOffset(sendOffset) {
+      _sendEveryX(sendEveryX) {
     _baseLogger->registerDataPublisher(this);  // register self with logger
 }
 dataPublisher::dataPublisher(Logger& baseLogger, Client* inClient,
-                             uint8_t sendEveryX, uint8_t sendOffset)
+                             int sendEveryX)
     : _baseLogger(&baseLogger),
       _inClient(inClient),
-      _sendEveryX(sendEveryX),
-      _sendOffset(sendOffset) {
+      _sendEveryX(sendEveryX) {
     _baseLogger->registerDataPublisher(this);  // register self with logger
 }
 // Destructor
@@ -53,11 +52,10 @@ void dataPublisher::attachToLogger(Logger& baseLogger) {
 }
 
 
-// Sets the parameters for frequency of sending and any offset, if needed
-// NOTE:  These parameters are not currently used!!
-void dataPublisher::setSendFrequency(uint8_t sendEveryX, uint8_t sendOffset) {
+// Sets the interval (in units of the logging interval) between attempted
+// data transmissions
+void dataPublisher::setSendInterval(int sendEveryX) {
     _sendEveryX = sendEveryX;
-    _sendOffset = sendOffset;
 }
 
 
@@ -71,34 +69,46 @@ void dataPublisher::begin(Logger& baseLogger) {
 }
 
 
-// Empties the outgoing buffer
-void dataPublisher::emptyTxBuffer(void) {
-    MS_DBG(F("Dumping the TX Buffer"));
-    for (int i = 0; i < MS_SEND_BUFFER_SIZE; i++) { txBuffer[i] = '\0'; }
+void dataPublisher::txBufferInit(Client* outClient) {
+    // remember client we are sending to
+    txBufferOutClient = outClient;
+
+    // reset buffer length to be empty
+    txBufferLen = 0;
 }
 
+void dataPublisher::txBufferAppend(const char* data, size_t length) {
+    while (length > 0) {
+        size_t remaining = MS_SEND_BUFFER_SIZE - txBufferLen;
+        size_t amount    = remaining < length ? remaining : length;
+
+        memcpy(&txBuffer[txBufferLen], data, amount);
+        length -= amount;
+        data += amount;
+        txBufferLen += amount;
+
+        if (txBufferLen == MS_SEND_BUFFER_SIZE) { txBufferFlush(); }
+    }
+}
 
-// Returns how much space is left in the buffer
-int dataPublisher::bufferFree(void) {
-    MS_DBG(F("Current TX Buffer Size:"), strlen(txBuffer));
-    return MS_SEND_BUFFER_SIZE - strlen(txBuffer);
+void dataPublisher::txBufferAppend(const char* s) {
+    txBufferAppend(s, strlen(s));
 }
 
+void dataPublisher::txBufferAppend(char c) {
+    txBufferAppend(&c, 1);
+}
 
-// Sends the tx buffer to a stream and then clears it
-void dataPublisher::printTxBuffer(Stream* stream, bool addNewLine) {
-// Send the out buffer so far to the serial for debugging
+void dataPublisher::txBufferFlush() {
 #if defined(STANDARD_SERIAL_OUTPUT)
-    STANDARD_SERIAL_OUTPUT.write(txBuffer, strlen(txBuffer));
-    if (addNewLine) { PRINTOUT('\n'); }
+    // send to debugging stream
+    STANDARD_SERIAL_OUTPUT.write((const uint8_t*)txBuffer, txBufferLen);
     STANDARD_SERIAL_OUTPUT.flush();
 #endif
-    stream->write(txBuffer, strlen(txBuffer));
-    if (addNewLine) { stream->print("\r\n"); }
-    stream->flush();
+    txBufferOutClient->write((const uint8_t*)txBuffer, txBufferLen);
+    txBufferOutClient->flush();
 
-    // empty the buffer after printing it
-    emptyTxBuffer();
+    txBufferLen = 0;
 }