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Update xdrv_12_home_assistant.ino

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Quick fix for #5356
This commit is contained in:
Theo Arends 2019-03-11 15:41:06 +01:00
parent d7715d1d2a
commit 5927f7501c
1 changed files with 3 additions and 1 deletions
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4
sonoff/xdrv_12_home_assistant.ino
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@ -170,7 +170,8 @@ int try_snprintf_P(char *s, size_t n, const char *format, ... )
{
va_list args;
va_start(args, format);
int len = vsnprintf_P(NULL, 0, format, args);
char dummy[2];
int len = vsnprintf_P(dummy, 1, format, args);
if (len >= n) {
AddLog_P2(LOG_LEVEL_ERROR, PSTR("ERROR: MQTT discovery failed due to too long topic or friendly name. "
"Please shorten topic and friendly name. Failed to format(%u/%u):"), len, n);
@ -232,6 +233,7 @@ void HAssAnnounceRelayLight(void)
Shorten(&command_topic, prefix);
Shorten(&state_topic, prefix);
Shorten(&availability_topic, prefix);
try_snprintf_P(mqtt_data, sizeof(mqtt_data)-1, HASS_DISCOVER_RELAY,
name, command_topic, state_topic, value_template, Settings.state_text[0], Settings.state_text[1], availability_topic);
try_snprintf_P(mqtt_data, sizeof(mqtt_data)-1, HASS_DISCOVER_DEVICE_INFO_SHORT, mqtt_data,