Library for ESP-OPEN-RTOS for QR code generation.
char myData[] = "http://example.com";
QRCode qrcode;
uint8_t *qrcodeBytes = malloc(qrcode_getBufferSize(QRCODE_VERSION));
qrcode_initText(&qrcode, qrcodeBytes, QRCODE_VERSION, ECC_MEDIUM, myData);
qrcode_print(&qrcode); // print on console
free(qrcodeBytes);
MIT licensed. See the bundled LICENSE file for more details.