ebay 103c8t6 oled, nrf24, esp8266 + empty pads

[scoace]

Anyone a good schematic in pdf format for this board ?

[zmemw16]

https://s3-ap-southeast-1.amazonaws.com ... 363817.jpg

that's about as good as it gets, however most of it is boiler plate.
if you can find any one of PA4-PA7, that's SPI1 etc.
same sort of thing for the I2C & UART's etc
OLED might be a problem.

all a bit of match the blobs jigsaw

i just tried looking at it with GIMP, it is just about readable.

stephen

[scoace]

Thanks Stephen, but that's exactly what i have found on the net. I would like to connect a NRF2401 and i can hardly read the pin#.

The NRF2401 Socket should be:

1 GND 2 VCC
3 PB0 CE 4 PB2 CSN
5 PA5 SCK 6 PA7 MOSI1
7 PA6 MISO1 8 PA15 IRQ

[zmemw16]

nrf24 8 pin signals

Code: Select all

1 GND 
2 VCC
3 PB0 CE 
4 PB2 CSN
5 PA5 SCK 
6 PA7 MOSI1
7 PA6 MISO1 
8 PA15 IRQ

& datasheet has PB as

Code: Select all

PB0
PB1
PB2 boot1 ***
PB3
PB4
PB5
PB6 i2c ***
PB7 i2c ***

so i'm not sure CE & CSN are on PB, i'm inclined to see those blobs as PC and a single digit.
i'd also have to suspect PB2 is incorrect, can't see them over-riding I2C1 either.
SPI1 and IRQ i agree with
using PC[0-7] 0-5 ADC 6-7 TIM3 would lose ADC's only, say PA4, PA5 ?
one of my boards has PA4 and PC4 for those 2 signals, PA4 is logical as its the default SPI1 cs line.
check which is really the nrf24 cs line, funny feeling it's CSN and CE is tx/rx mode switch

so it's waggling bits and observe using a led & resistor time
thought of building a Pig-O-Scope? then its waggle all at different rates etc etc
i've got OpenBench Logic Sniffer's for doing that.

stephen

[RogerL]

I have just noticed that the lowest ebay UK price for these boards has dropped by about 25% in the last few days:

http://www.ebay.co.uk/itm/272517368216? ... EBIDX%3AIT

http://www.ebay.co.uk/itm/292046951651? ... EBIDX%3AIT

[ahull]

With those radio pads, they look like they were designed with a specific purpose in mind, perhaps a Walkera DEVO 2.4GHZ remote clone, or some such device.. Interesting..

[democles9308]

The Pins are certainly BP0 en BP2 as indicated on the diagram posted earlier. Those pins are respectively pin 18 and 20 on the STMChip - did the test with a multimeter. I can't get the NRF module working using the (reworked) RF24 library. Did one of you got it working ? If so which library, any mods necessary ?
Thx

[stevestrong]

For NRF24 lib please have a look here: viewtopic.php?f=9&t=2028

[democles9308]

Hi Stevestrong,
Sorry for late reply... got the NRF working on this board using the RF24-STM https://github.com/jaretburkett/RF24-STM. I Used the RF24(PB0,PB2) and used autoACK, dynamic Payload and enableackpayload features.
As already mentioned I use this for my DIY RC transmitter / drone. The ackPayload gives some info back from the drone ( Battery voltage, pressure, heading,...). Its already working on arduino, I'm trying to port the code to STM32 with the magnificent help of the video of Joop Brokking ( )

Happy 2018!

[zmemw16]

which video ?
srp