update readme.md (time sync)
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@ -206,7 +206,7 @@ Paxcounter supports a battery friendly power saving mode. In this mode the devic
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# Time sync
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Paxcounter can keep it's time-of-day synced with an external time source. Set *#define TIME_SYNC_INTERVAL* in paxcounter.conf to enable time sync. Supported external time sources are GPS, LORAWAN network time and LORAWAN application timeserver time. An on board DS3231 RTC is kept sycned as fallback time source. Time accuracy depends on board's time base which generates the pulse per second. Supported are GPS PPS, SQW output of RTC, and internal ESP32 hardware timer. Time base is selected by #defines in the board's hal file, see example in [**generic.h**](src/hal/generic.h). Bonus: If your LORAWAN network does not support network time, you can run a Node-Red timeserver application using the enclosed [**Timeserver code**](/src/Node-RED/Timeserver.json). Configure MQTT nodes in Node-Red for the LORAWAN application used by paxocunter device.
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Paxcounter can keep a time-of-day synced with external or on board time sources. Set *#define TIME_SYNC_INTERVAL* in paxcounter.conf to enable time sync. Supported external time sources are GPS, LORAWAN network time and LORAWAN application timeserver time. Supported on board time sources are the RTC of ESP32 and a DS3231 RTC chip, both are kept sycned as fallback time sources. Time accuracy depends on board's time base which generates the pulse per second. Supported are GPS PPS, SQW output of RTC, and internal ESP32 hardware timer. Time base is selected by #defines in the board's hal file, see example in [**generic.h**](src/hal/generic.h). Bonus: If your LORAWAN network does not support network time, you can run a Node-Red timeserver application using the enclosed [**Timeserver code**](/src/Node-RED/Timeserver.json). Configure the MQTT nodes in Node-Red for the LORAWAN application used by your paxocunter device. Time can also be set without precision liability, by simple remote command, see section remote control.
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# Wall clock controller
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@ -567,6 +567,7 @@ Send for example `83` `86` as Downlink on Port 2 to get battery status and time/
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0x01 = RTC
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0x02 = LORA
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0x03 = unsynched (never synched)
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0x04 = set (source unknown)
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bits 4..7 time status
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0x00 = timeNotSet (never synched)
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