nRF5 action!

[NeverDie]

I see that Amazon is selling the Arduino Primo now: https://www.amazon.com/Arduino-A000138-low-power-coin-sized-wearables/dp/B073JN7XXR/ref=sr_1_12?ie=UTF8&qid=1501982634&sr=8-12&keywords=nrf52832

First time I've seen it for sale anywhere.

[Toyman]

@NeverDie they also has started to sell "big" Primo

[NeverDie]

@Toyman said in nRF5 Bluetooth action!:

@NeverDie they also has started to sell "big" Primo

Yeah, the big version has Wi-Fi, so I suspect it's meant to function much like a wireless serial gateway.

For the convenience of other readers here, here's a link:
https://www.amazon.com/Arduino-A000135-featuring-Nordic-processor/dp/B0721P6STJ/ref=sr_1_1?ie=UTF8&qid=1502011422&sr=8-1&keywords=arduino+primo

[NeverDie]

Maybe you can get much of the same benefits--but at a lower cost--by combining an nRF5 with an ESP8266. Example:
https://www.openhardware.io/view/443/nRF52832-ESP-LINK-Shield-for-ESP8266-Wemos-D1-Mini

[NeverDie]

This is strange: now when I do the timed sleep on the infor-link module, it shows a current drain of about 60ua, whereas yesterday it was around 6ua. Maybe I somehow damaged it by connecting a couple of the input pins (A2 and A4) to Vcc? I wouldn't think so, though, because the datasheet says it should be safe to Vcc + 0.3v.

I have one unused infor-link module left. I'll try wiring it up, but without the input pins this time, and measure it. I'm wondering now whether the sleep current will measure out to be 60ua, or 6ua.

[d00616]

@NeverDie said in nRF5 Bluetooth action!:

Is there a mysensors demo sketch that involves i2c? I could try it on my end, though I expect I'd probably get the same as you.

I have used I2C with an display and u8g2 without any problem.

@NeverDie said in nRF5 Bluetooth action!:

I have one unused infor-link module left. I'll try wiring it up, but without the input pins this time, and measure it. I'm wondering now whether the sleep current will measure out to be 60ua, or 6ua

With the nRF51 there is an bug, after using the debug interface the current consumption is higher until reset.

[rmtucker]

@d00616 said in nRF5 Bluetooth action!:

I have used I2C with an display and u8g2 without any problem.

Yes But it seems to have trouble reading sensors.
It has been mentioned on sandeepmistry github.

[NeverDie]

@NeverDie said in nRF5 Bluetooth action!:

This is strange: now when I do the timed sleep on the infor-link module, it shows a current drain of about 60ua, whereas yesterday it was around 6ua. Maybe I somehow damaged it by connecting a couple of the input pins (A2 and A4) to Vcc? I wouldn't think so, though, because the datasheet says it should be safe to Vcc + 0.3v.

I have one unused infor-link module left. I'll try wiring it up, but without the input pins this time, and measure it. I'm wondering now whether the sleep current will measure out to be 60ua, or 6ua.

The answer is.... neither. This time, with a fresh infor-link module, it measured at about 16ua.

However, I'm guessing there's quite a lot of noise involved, because this time I noticed I could change the reading just by moving my hand closer or further away from the infor-link module. So, I may have to scope this to see what's going on.

[d00616]

@rmtucker said in nRF5 Bluetooth action!:

@d00616 said in nRF5 Bluetooth action!:

I have used I2C with an display and u8g2 without any problem.

Yes But it seems to have trouble reading sensors.
It has been mentioned on sandeepmistry github.

I have found this issue: https://github.com/sandeepmistry/arduino-nRF5/issues/180

Is this yours?

[rmtucker]

@d00616
No not mine but that is the issue i was talking about.
When connecting DS3231 RTC i get the same as that guy mentions.
When connecting HTU21D the readings are all over the place.

[NeverDie]

@NeverDie said in nRF5 Bluetooth action!:

@NeverDie said in nRF5 Bluetooth action!:

This is strange: now when I do the timed sleep on the infor-link module, it shows a current drain of about 60ua, whereas yesterday it was around 6ua. Maybe I somehow damaged it by connecting a couple of the input pins (A2 and A4) to Vcc? I wouldn't think so, though, because the datasheet says it should be safe to Vcc + 0.3v.

I have one unused infor-link module left. I'll try wiring it up, but without the input pins this time, and measure it. I'm wondering now whether the sleep current will measure out to be 60ua, or 6ua.

The answer is.... neither. This time, with a fresh infor-link module, it measured at about 16ua.

However, I'm guessing there's quite a lot of noise involved, because this time I noticed I could change the reading just by moving my hand closer or further away from the infor-link module. So, I may have to scope this to see what's going on.

So, I decided to try running it from a 10F 2.7v supercap and see how long it lasts. It reports its voltage once every 5 minutes. I'm using Domoticz to log the values and graph them.

[NeverDie]

@d00616 said in nRF5 Bluetooth action!:

@rmtucker said in nRF5 Bluetooth action!:

@d00616 said in nRF5 Bluetooth action!:

I have used I2C with an display and u8g2 without any problem.

Yes But it seems to have trouble reading sensors.
It has been mentioned on sandeepmistry github.

I have found this issue: https://github.com/sandeepmistry/arduino-nRF5/issues/180

Is this yours?

Does it rest entirely on Sandeep's shoulders as to if/when it gets fixed? I'm trying to understand how big/small the workforce is.

[NeverDie]

@rmtucker said in nRF5 Bluetooth action!:

@d00616
No not mine but that is the issue i was talking about.
When connecting DS3231 RTC i get the same as that guy mentions.
When connecting HTU21D the readings are all over the place.

@scalz Have you encountered any I2C problems in your work on Aeos? I seem to recall you have a TH sensor in it.

[rmtucker]

@NeverDie
Actually i wonder if development has stopped?
no new commits in three months?

[rmtucker]

@NeverDie
Trouble is the aeos is using nrf52 not nrf51.

[NeverDie]

@rmtucker said in nRF5 Bluetooth action!:

@NeverDie
Trouble is the aeos is using nrf52 not nrf51.

At least it would be something, rather than nothing. Wouldn't you rather be on nRF52 anyway? It has advantages. (I say that even though I do have some nRF51's on order, but only just because they're small and cheap).

[rmtucker]

@NeverDie
yes but it would take 4-6weeks and i was impatient so thought i would start with what i could get.
But it seems it does not work on either looking at some of the other issues on sandeeps github.

[NeverDie]

@rmtucker
Hmmmm... Maybe this explains why I didn't notice any MySensor's example demo code that used I2C.

On the other hand, I wouldn't think the gap can be all that big if d00616 is able to use I2C for display purposes.

Still, that by itself doesn't get you there.

[NeverDie]

@rmtucker

Bummer. I guess you still have anticimex's suggestion though of the bit-bang workaround, if you're so inclined. If you're able to get that to work, please do post to let us know.

[scalz]

@NeverDie i have no problem with my aeos (nrf52) and i2c so far. only tested the onboard sensors.

agree, in case, you can use a software i2c lib.