Best posts made by ximinez

Well that went south pretty fast. Was wondering why my sensebender was acting up. Took a while to see that I had plugged in an ESP8266 module instead of one of my NRF24 modules. Those modules look far too much alike

Serial output now looks like this: "Sånsebåndåò Micro FW 1.3" with random characters corrupted. I think I've killed it
I can still flash firmware to it via serial, so it's not completely dead.

I can however confirm that both the SHA204A and SI7021 self-tests OK being powered on in-sketch:
(Flash seems to randomly fail or test OK, not sure why yet)

þSånseâånder Micòo F× 1.3 - TesôÍoäe
Tåstiîg påòipheraló!
-> ÓÉ7021 : ok!
-> Æìasè : æailed!
-> SÈA204 : Ïk (seòéal : 01234ÂBAÅ259E8AÄÅE)
Tåót fiîésheä
----> Óelftest æaiìåä!

@FotoFieber said:

@Anticimex said:

@FotoFieber with a SenseBender, there is no reason for soft signing. It should have a ATSHA204A chip. But nice that you have working setup

Yes, but encryption and ATSHA204A is to big for the SenseBender...

Old thread, but... In the dev branch, there's a RF24 refactor that is much smaller. With that, and removing test-mode, there's plenty of space on the sensebender:

#define MY_RADIO_NRF24
#define MY_SIGNING_ATSHA204
#define MY_SIGNING_REQUEST_SIGNATURES
#define MY_SIGNING_NODE_WHITELISTING {{.nodeId = GATEWAY_ADDRESS,.serial = {0xBO,0xGU,0xSK,0xEY,0xZZ,0xFC,0xAD,0x04,0xD1}}}
#define MY_OTA_FIRMWARE_FEATURE
#define MY_RF24_ENABLE_ENCRYPTION

Sketch uses 23,196 bytes (75%) of program storage space. Maximum is 30,720 bytes.
Global variables use 1,386 bytes (67%) of dynamic memory, leaving 662 bytes for local variables. Maximum is 2,048 bytes.

Even with debug it's only at 91%.

My W5100 gateway ends up at 107% with AES though, but it fits (with 592 bytes to spare) if I use a static address instead of DHCP.
Serial Gateway ends up at only 65%.

Yes. When I say that I haven't changed the pins, I mean that I haven't changed the physical pins (or the CE/CSN numbers in my sketch) compared to when the same setup worked with the previous RF24 driver.

I love the difference in available space the new driver gives, but I'd love it even more if the radio continued to work

Ok, I've been looking at the image and my spare sensor. It looks like:
Power to the NRF can be cut between C3 and VCC pin.
ATSHA204a power can be cut on the trace that goes from the atsha and beneath the flash.
Si7021 power can be cut at the trace that goes from C4.

I just might have to dig out my scalpel and iron for this. If the components magically work without any extra initialization on powerup, modifying the code looks easy.

I'll report back with my findings