@evb said in Please give me an advice for a simple sensor node:
But the node will continue to work till 1.8V in a safe operating area.
Yeah sure, but alkaline batteries are nearly depleted when they get to 1V, so barely worth the hassle.
@thom4s said in [SOLVED] STM32F103C8T6 bluepill clone - RFM69HW SPI port 1 and ILI9341 SPI port 2 not working together:
o myself. Problem were in wrong definition of IRQ pin in sketch. But, as I found out STM32F103C8T6 has SPI 1 running on 72MHz (for SPI max 72/2 = 36MHz) and SPI 2 36MHz (for SPI max 36/2 = 18MHz) so it were a stupid idea to wire TFT display to SPI 2 port which is slower than SPI 1 with RFM69HW which doesnt need so fast SPI. Therefore I switched radio to SPI-2 and TFT display to faster SPI-1.
Radio SPI-2 and TFT ILI9341 SPI-1 wiring
I'm having the same problem with NRF24L01 + ILI9341.
TFT is on the SPI2 , its working but NRF24L01 on SPI1 doesnt work the moment i call tft.begin.
Its not hardware related. something is wrong when i initialize the spi in the Adafruit_ILI9341_STM::begin
Any thoughts?
Oh boys... a lot of information here.
Thanks so much... but I've already place the pcb order... I have make an order for 10 pieces.
Bun in the mean time I'll experiment and modify the schema thanks to you all
Anyway I have placed there this capacitor ... I hope will be ok for this time.
Thanks so much for all information
Denis
@BearWithBeard said in Battery life calculator:
you'd wake up every 30 seconds instead of once every 2 minutes.
Whoawwww... I had entered wrong times
Now I take 409 days... great !!!
Thanks a lot again
Denis
