SIM7000-LTE-Shield
SIM7000-LTE-Shield copied to clipboard
botletics
FTP upload image
Fail to use image upload, with following error. invalid conversion from 'const char*' to 'char' [-fpermissive] Please see if you may help to update the FTP demo
// Now the really cool part! We're going to upload // a picture to the server using the extended PUT // method (auto-detected inside the FTP_PUT method // based on the content size // NOTE: Haven't tested extended PUT method yet because // SIM7000G firmware does not support it for some reason...
size_t fileSize; char * uploadContent = readFromFile("small-img.jpg", &fileSize); Serial.print("File size: "); Serial.print(fileSize); Serial.println(F(" bytes")); // Upload picture via FTP if (!fona.FTP_PUT("small-img.jpg", "/", uploadContent, fileSize)) { // File name, file path, content, content length Serial.println(F("Failed to upload!")); }
The readFromFile function is not pointer function: // Read the contents of a file in the SD card char readFromFile(const char fileName, size_t * fileSize) { char contentBuff[250];
myFile = SPIFFS.open(fileName); *fileSize = myFile.size();
if (myFile) { // Read from the file until there's nothing else in it while (myFile.available()) { strcat(contentBuff, myFile.read()); } myFile.close(); // Close the file; only 1 can be open at a time } else { Serial.println("Error opening file!"); }
return contentBuff; }
