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support for publishing message with empty data

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David Cermak
2019-04-26 09:30:53 +02:00
parent 891646681e
commit d159bf4575
1 changed files with 6 additions and 1 deletions
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7
mqtt_client.c
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@ -1189,7 +1189,12 @@ int esp_mqtt_client_publish(esp_mqtt_client_handle_t client, const char *topic,
{
uint16_t pending_msg_id = 0;
if (len <= 0) {
/* Acceptable publish messages:
data == NULL, len == 0: publish null message
data valid, len == 0: publish all data, payload len is determined from string length
data valid, len > 0: publish data with defined length
*/
if (len <= 0 && data != NULL) {
len = strlen(data);
}