Hi there.

First small update is here. Github project created https://github.com/Riconec/Autonomous-solar-powered-wireless-sensor-node and have initial commit with altium libraries added for SPV1050 Harvester, STM32F070F6P6 (STM32F030F4P6 or another TSSOP20 STM32), STM32L011D3P6. Some pictures added.

Next steps:
1) Create schematic for SPV1050 in boost configuration.
2) Measure VAC of different solar cells (currently I have two, but planned to have 2-3 more to find the best one). Software and hardware for measuring also can be created (or I can use keithley source meter and Labview program).
3) Write a program to calculate passive components for SPV1050. Can be useful, I think.


Pics:
Solar panel made of two 0.5V 140mW solar cells ($2 10pcs).

VAC of three solar cells (140mW 0.5V again) connected in series. Source of light - 60W light bulb.