Bulanov Konstantin

This is CORS (https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)

> Hello. I am an elastic beginner student using the elastic_client package. I would like to communicate with my elasticsearch with read permission via username and password in Flutter app....

``` final _transport = ConsoleHttpTransport(Uri.parse('http://test.ru:9200/')); String query = '''{ "query": { "multi_match": { "query": "John*", "fields": "*" } } }'''; final response = await _transport.send(Request('POST', ['kpmi_etalon_obj','_search'], bodyText: query)); if (response.statusCode...

> I think i could start with documentation. any guidelines provided? Please add more examples.

Hi! look this project [https://github.com/leech001/Security-fire-alarm-ESP8266](url) I think I solved the problem there

Попробуйте изменить функцию работы с i2c. На F1 серии наблюдаются ошибки при работе с данным протоколом. ``` void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(i2cHandle->Instance==I2C2) { /* USER CODE...

Hi. I can only make the following assumptions: 1. Check the power supply, the module should come to +5V. Since the module itself has a downgrading LDO to 3.3V; 2....

Hi. Look at my example https://github.com/leech001/SIM800MQTT/blob/master/examples/MQTTSUB/Core/Src/main.c where the data is sent and received at the same time. If you get a CLOSED response from module it means that connection at...

 The default QoS value of 0 is passed to the subscription function

Как вариант можете попробовать изменить если у вас именно ругается на Qos