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enable retain on publish. Fixes #20 #36

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enable retain on publish. Fixes #20 #36

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3 changes: 2 additions & 1 deletion Adafruit_MQTT.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -583,8 +583,9 @@ uint8_t Adafruit_MQTT::publishPacket(uint8_t *packet, const char *topic,
uint8_t *data, uint8_t bLen, uint8_t qos) {
uint8_t *p = packet;
uint16_t len;
uint8_t retain = 0x1;

p[0] = MQTT_CTRL_PUBLISH << 4 | qos << 1;
p[0] = MQTT_CTRL_PUBLISH << 4 | qos << 1 | retain << 0;
// fill in packet[1] last
p+=2;

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