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Allowing for larger MQTT messages #100

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Allowing for larger MQTT messages #100

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17eefdf
Allowing for larger MQTT messages
Nov 18, 2017
fa10947
Allowing for larger MQTT messages
Nov 18, 2017
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11 changes: 7 additions & 4 deletions Adafruit_MQTT_Client.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -76,16 +76,19 @@ uint16_t Adafruit_MQTT_Client::readPacket(uint8_t *buffer, uint16_t maxlen,

bool Adafruit_MQTT_Client::sendPacket(uint8_t *buffer, uint16_t len) {
uint16_t ret = 0;

uint16_t bufferOffset = 0;
//Serial.print("Buffer recieved : ");
while (len > 0) {
if (client->connected()) {
// send 250 bytes at most at a time, can adjust this later based on Client

uint16_t sendlen = min(len, 250);
//Serial.print("Sending: "); Serial.println(sendlen);
ret = client->write(buffer, sendlen);
uint16_t sendlen = min(len, MAX_SINGLE_PACKET_SIZE);

ret = client->write(buffer + bufferOffset, sendlen);
client->flush();
DEBUG_PRINT(F("Client sendPacket returned: ")); DEBUG_PRINTLN(ret);
len -= ret;
bufferOffset += ret;

if (ret != sendlen) {
DEBUG_PRINTLN("Failed to send packet.");
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1 change: 1 addition & 0 deletions Adafruit_MQTT_Client.h
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Expand Up @@ -28,6 +28,7 @@

// How long to delay waiting for new data to be available in readPacket.
#define MQTT_CLIENT_READINTERVAL_MS 10
#define MAX_SINGLE_PACKET_SIZE 1200


// MQTT client implementation for a generic Arduino Client interface. Can work
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