// Copyright 2019 Espressif Systems (Shanghai) PTE LTD // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. #pragma once #include #ifdef __cplusplus extern "C" { #endif /** * @brief Generate and display QR Code on the console * Encodes the given string into a QR Code & displays it on the console * * @attention 1. Can successfully encode a UTF-8 string of up to 2953 bytes or an alphanumeric * string of up to 4296 characters or any digit string of up to 7089 characters * * @param text string to encode into a QR Code. * * @return * - ESP_OK: succeed * - ESP_FAIL: Failed to encode string into a QR Code * - ESP_ERR_NO_MEM: Failed to allocate buffer for given MAX_QRCODE_VERSION */ esp_err_t qrcode_display(const char *text); #ifdef __cplusplus } #endif