Sensebender Micro

[ximinez]

Got it now :)
I had two different sketches and had edited the wrong one. Now I have actual values.
Is there an example GW sketch that I can load quickly to my Uno/W5100 shield/NRF24?

[Anticimex]

:thumbsup:
I'm rusty on the gateways. But on development branch, configuring signing is easier than on master branch. My link gives the details on signing configuration for both nodes and gateways with examples.

[ximinez]

Yeah, I'm struggling a bit with those instructions. I've set up my gateway with soft signing, and got sane values written to EEPROM.
Now, do I need any of the three values to personalize the sensebender?
SOFT_HMAC_KEY?

[Anticimex]

@ximinez the SenseBender you have patched/cut needs atsha personalization, so no SOFT anything. But you need to have the same hmac key stored on the atsha on the SenseBender as you have picked as soft hmac key in eeprom of your gateway (the node you have personalized for soft signing).

[ximinez]

@Anticimex Yeah, that's what I asked ;)

I get:
Writing key to slot 0...
Data lock failed. Response: D3

[Anticimex]

@ximinez locking data is a very bad idea. It will prevent you from changing the hmac key. You only need to (and should) lock configuration. Only lock data if you really know what you are doing.

[ximinez]

Writing key to slot 0...
Data not locked. Define LOCK_DATA to lock for real.

Personalization is now complete.
Configuration is LOCKED
Data is UNLOCKED

[Anticimex]

@ximinez looks good. You should be done with personalization. Remember to require signatures from the SenseBender in addition to "enabling" it. You can also require signature on the GW, thus forcing all communications between them to be signed. The serial console will reveal how it goes. You can enable verbose debug (MY_DEBUG_VERBOSE_SIGNING) for the signing if you want more details on the signing parts.

[ximinez]

I have the sensor sketch mostly done, but I'll have to do some soldering again tomorrow. It looks like D7 got burnt when I plugged in my ESP8266, giving ~0,5v out on that pin. Will have to work around that:

Sôártinç óensor (RÎONA-, 2.0.0-beta)
Raäio init æáiìåd. Ãèeck wiring.

When that is OK, I'll look at the GW sketch.

[Anticimex]

Sounds good. Bedtime here too.

[ximinez]

D3, D4 and D7 are all funky, and do not give ~3v when set high. So I'm back to the radio being on all the time.
D5 and D6 mysteriously work just fine.

Radio is now OK, but the sensebender reboots before it gets to setup().
Stárting óensor (ÒÎONA-, 2.0.0-beôá)
Ráäio init suããessæuì.
æéîä parenô
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,óô=bc:
[reboot and repeat]

[tbowmo]

@ximinez

Sounds like it's on its way to the "other side"..

[ximinez]

Yup. Setting up my other sensebender as a proper signing sensor and my uno as a gateway. This will have to wait until I get a couple more working sensors.

[ximinez]

Ok. I set up my GW, and set up my healthy sensebender as an outdoor sensor. The zombie sensor is now a working indoor sensor.
I have enabled signing and set up whitelisting, but enabling signing debugging makes the sketch oversize, so I can't actually check if signing works - but atleast now I have two sensors.

[Anticimex]

You will still be notified without verbose logging. And if you have enabled and require signing, you won't get any data if something fails (assuming signing is properly activated).

[user2334]

@user2334 said:

I just received two Sensebenders, but have problems getting the device to consume little power. I get totally different values as displayed above.

With the following sketch, I get about 5,6mA in active state and 1,6mA in sleep mode with nRF24 attached. I have compared different nRF24-chips and this one consumed the least power.

Without the nRF24, I get 4mA and 0,025mA (=25µA) during sleep mode.

#include <LowPower.h>
#include "RF24.h"

RF24 radio(9, 10);

void setup() {
}

void loop() {
    delay(8000);
    LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
}

As a follow-up to my previous posting, I can confirm, that using original nRF24-modules (best source seems to be https://www.itead.cc/nrf24l01-module.html), I get 0,023mA (=23µA) with nrf24 attached during sleep mode (no difference between the libraries JeeLib->Sleepy::loseSomeTime or LowPower->LowPower.powerDown).

It is quite interesting, that so many nRF24 Modules (bought from eBay, from Amazon UK) are clones with higher power consumption. Some of them use 3mA, some have electrical short, ...

[ximinez]

@Anticimex I've set MY_SIGNING_SOFT, MY_SIGNING_REQUEST_SIGNATURES and MY_SIGNING_NODE_WHITELIST on the GW, and reenabled (normal) debug but not signing debug since that is too big.
With those enabled, if the sending node does not sign, I should not get this?

0;255;3;0;9;read: 2-2-0 s=1,c=1,t=0,pt=7,l=5,sg=0:6.3
0;255;3;0;9;read: 2-2-0 s=2,c=1,t=1,pt=2,l=2,sg=0:59

[Anticimex]

@ximinez The GW will only require signatures from a node that in turn require signatures.
It is the sg-flag that indicate if a message is signed, in your case, both messages are unsigned.
If you only have node->gw communication, both gw and node has to require signatures for you to see signed messages.
If you have gw->node communication, it is enough that the node require signatures, the gw will then sign them, no matter if the gw require signatures or not.

[ximinez]

0;255;3;0;9;read: 3-3-0 s=1,c=0,t=6,pt=0,l=0,sg=0:
0;255;3;0;9;read: 3-3-0 s=2,c=3,t=16,pt=0,l=0,sg=0:
0;255;3;0;9;send: 0-0-3-3 s=255,c=3,t=17,pt=6,l=25,sg=0,st=ok:57ACB4BD46843BFCC7ABA693CC5AA527F7724531F525338E8A
0;255;3;0;9;read: 3-3-0 s=2,c=0,t=7,pt=0,l=0,sg=0:

I feel more secure now :-P

[Anticimex]

@ximinez Hm, good, but I still see no signed message. But at least a nonce was sent