DigitalInfinity/ESP32-PaxCounter
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repair convert mac to mqtt clientname

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This commit is contained in:
cyberman54 2020-12-28 00:03:37 +01:00
parent 73263c3d04
commit 70150fa606
1 changed files with 4 additions and 4 deletions
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8
src/mqttclient.cpp
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@ -42,12 +42,12 @@ esp_err_t mqtt_init(void) {
int mqtt_connect(const char *my_host, const uint16_t my_port) {
IPAddress mqtt_server_ip;
uint8_t mac[6];
char clientId[16];
char clientId[20];
// hash 6 digit MAC to 4 digits
// hash 6 byte MAC to 4 byte hash
esp_eth_get_mac(mac);
const uint16_t hashedmac = hash((const char *)mac, 4);
snprintf(clientId, 16, "paxcounter_%04x", hashedmac);
const uint32_t hashedmac = hash((const char *)mac, 6);
snprintf(clientId, 20, "paxcounter_%08x", hashedmac);
ESP_LOGI(TAG, "MQTT name is %s", MQTT_CLIENTNAME);