After hours/days of debugging and tuning I have working reliable transmission.

Some facts:

Transmission time for 16bit data with 1200bps is 34ms with all sync and receiver tuning bites

Harvester features:

Key timing component is middle capacitor, and there is some power facts
As load is connected Attiny85/1Mz with running code (no sleep) without transmitter

Power supply length

• 100n = 15ms run-time every 1s
• 1uF = 17ms run time every 13s
• 10uF = 35ms every 60s

I have now reliable transmission for 16bit value every 30minutes, It is little long time but I am on beginning
with this project.

Without load is power supply pulse 60ms long every 60s