RE: Wireless Communication Synchronization System

Shinya Sakaida — Thu, 31 Aug 2023 05:03:24 GMT

Dear D_Crow

We would like to introduce an example of the Wireless Communication Synchronization System that we developed.
The above Wireless Communication Synchronization System is a system in which LEDs mounted on multiple wireless devices emit light synchronously.

Sends synchronization request signal and data every 250ms.
The synchronization request signal and data are received every 30 seconds, which is 120 times 250ms.
The CPU is normally in a sleep state and becomes active only when transmitting and receiving synchronization request signals and data.
When receiving, it wakes up from sleep just before the timing of transmission from another radio, and goes back to sleep after receiving.
It sleeps when not transmitting or receiving to reduce power consumption.
Power consumption is less than 3V 200uA, excluding LED lighting current.
The LED is switched on and off at the timing of waking up from sleep every 250ms.
The synchronization difference between multiple radios is 0 to 30ms.
In the above system that switches the LED ON and OFF every 250 ms when waking up from sleep, there is a maximum 30 ms lag in synchronized light emission, but this lag is invisible to the human eye.

Best regards

RE: Wireless Communication Synchronization System

D_Crow — Wed, 30 Aug 2023 19:42:53 GMT

Hi Shinya,

Nice idea for a synced system, have you tested it to see what synchronisation accuracy can be achieved? The system described by a Nordic employee here has a 65 ns jitter between wirelessly synced timers at a 100 Hz transmit rate but is quite power hungry.