Method parseMultiLineResponse

src/ELMduino.cpp:2609–2694

void ELM327::parseMultilineResponse() Description: ------------ * Parses a buffered multiline response into a single line with the specified data * Modifies the value of payload for further processing and removes the '\r' chars Inputs: ------- * void Return: ------- * void */

  * void
*/
void ELM327::parseMultiLineResponse() {
    uint8_t totalBytes = 0;
    uint8_t bytesReceived = 0;
    char newResponse[PAYLOAD_LEN];
    memset(newResponse, 0, PAYLOAD_LEN * sizeof(char)); // Initialize newResponse to empty string
    char line[256] = "";
    char* start = payload;
    char* end = strchr(start, '\r');
  
   do 
    {   //Step 1: Get a line from the response
        memset(line, '\0', 256); 
        if (end != NULL) {
            strncpy(line, start, end - start);
            line[end - start] = '\0';
        } else {
            strncpy(line, start, strlen(start));
            line[strlen(start)] = '\0';
    
            // Exit when there's no more data
            if (strlen(line) == 0) break;
        }
    
        if (debugMode) {
            Serial.print(F("Found line in response: "));
            Serial.println(line);
        }
        // Step 2: Check if this is the first line of the response
        if (0 == totalBytes)
        // Some devices return the response header in the first line instead of the data length, ignore this line
        // Line containing totalBytes indicator is 3 hex chars only, longer first line will be a header.
        { 
            if (strlen(line) > 3) {
                if (debugMode)
                {
                    Serial.print(F("Found header in response line: "));
                    Serial.println(line); 
                }
            }
            else {
                if (strlen(line) > 0) {
                    totalBytes = strtol(line, NULL, 16) * 2;
                    if (debugMode) {
                        Serial.print(F("totalBytes = "));
                        Serial.println(totalBytes);
                    }
                }
            }
        } 
        // Step 3: Process data response lines 
        else { 
            if (strchr(line, ':')) {
                char* dataStart = strchr(line, ':') + 1;
                uint8_t dataLength = strlen(dataStart);
                uint8_t bytesToCopy = (bytesReceived + dataLength > totalBytes) ? (totalBytes - bytesReceived) : dataLength;
                if (bytesReceived + bytesToCopy > PAYLOAD_LEN - 1) {
                    bytesToCopy = (PAYLOAD_LEN - 1) - bytesReceived;
                }