💬 Button size radionode with sensors swarm extension

alexsh1

@Koresh yes, I'm using it with the 2032 battery.
Which pads to your refer to please?

yury

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

@yury said in 💬 Button size radionode with sensors swarm extension:

@alexsh1 220 mAh(Duracell) / 0.025 (mA) = 8800 hrs = 366 days.

Not exactly - 25uA is a sleeping current.
There will be sending periods every 10 mins.
So I suppose the lifetime is less than a year

Yes, it is sleeping time estimate. When it wakes up it compares first, like : if ( abs(d) > 50 ) send(msg_vis.set(VIS_LIGHT), true); so it might send or not.
But this is just example sketch and you are very welcome to create pull-request or make suggestion how to improve.

Koresh

@alexsh1 You can fit juper (or any small wire, R10 on the schematic) or remove LDO at all and short top two pads.

alexsh1

@yury ok, you took the best case scenario (no messages as all) and if we take worst case scenario - sending every 10 mins in any case (suppose no if statement).

Then we take life time somewhere in between.
I think it make sense to take 18uA as a sleeping current removing the LDO from equation

alexsh1

@Koresh said in 💬 Button size radionode with sensors swarm extension:

@alexsh1 You can fit juper (or any small wire, R10 on the schematic) or remove LDO at all and short top two pads.

More neat solution is to remove LDO and solder 0 ohm resistor (R10). Looks nice

Ok, 18uA - this is more like it.
Thank you very much for helping to get it sorted. Now I need to understand why the consumption has gone when using Si1132

@yury Did you test power consumption of modules with Si1132 please? I hope it was a bad soldering on my side

alexsh1

@yury I suggest we use this:

http://oregonembedded.com/batterycalc.htm

Based on non-LDO board consumption of 18uA the battery life assuming constant updates 10 mins and 140ms wake-up time (120ms is needed by bh1750) is 1.03 years. Excellent

yury

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

Did you test power consumption of modules with Si1132 please? I hope it was a bad soldering on my side

Could not find good code to send it to sleep. without it Si1132 was eating a lot...

alexsh1

@yury Hmmmm. Datasheet is stating that the standby current < 500 nA

However, actively measuring current - 4.5mA
This would kill 2032 very quickly

alexsh1

@Koresh another alternative would be using Si1145 it is pin-for-pin compatible with Si1132 and

This low-power sensing family enables long battery life with standby less than 500 nA and an average power of as little as 1.2 uA with once per second real-time UV Index measurements.

However, I still think that Si1132 can be working with the battery nicely. 0x18 register is a key:

The COMMAND Register is the primary mailbox register into the internal sequencer. Writing to the COMMAND register is the only I2C operation that wakes the device from standby mode.

The only question is how to put the sensor into the standby mode after all measurements are taken

Nca78

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

However, actively measuring current - 4.5mA
This would kill 2032 very quickly

Matter of hours I guess, it's half more than the max continuous discharge current of a CR2032.

alexsh1

@Nca78 said in 💬 Button size radionode with sensors swarm extension:

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

However, actively measuring current - 4.5mA
This would kill 2032 very quickly

Matter of hours I guess, it's half more than the max continuous discharge current of a CR2032.

It is 4.mA for 120ms for less just for measurements
However, I agree that this is not very battery friendly

Nca78

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

@Nca78 said in 💬 Button size radionode with sensors swarm extension:

@alexsh1 said in 💬 Button size radionode with sensors swarm extension:

However, actively measuring current - 4.5mA
This would kill 2032 very quickly

Matter of hours I guess, it's half more than the max continuous discharge current of a CR2032.

It is 4.mA for 120ms for less just for measurements
However, I agree that this is not very battery friendly

Ah ok I completely misunderstood :D But yes seems high for a CR2032 sensor...

Terrence

This post is deleted!

Abdu Sahin

@Koresh,
I tried to buy some of these on the link you provided, but couldn't do it. Do you still have this component in your stock ? I like to buy 865mhz HW/W versions.

yury

@Abdu-Sahin said in 💬 Button size radionode with sensors swarm extension:

865mhz HW/

Hi

They will be ready end of this week. do you need both HCW and CW versions?

Abdu Sahin

@yury
I like to try both 865 HW/W versions. I need sensors with long battery life and good RF distance coverage for my project. I've noticed some people suggested using only 'W' version for battery powered nodes, but from my initial experience I didn't have good distance with 'W' version.

yury

@Abdu-Sahin said in 💬 Button size radionode with sensors swarm extension:

I need sensors with long battery life and good RF distance coverage

)) either good battery life or good coverage though... or good coverage and 2-3 AA batteries. CW is 20 mA when sending signal and HCW is about 100 mA. CR2032 battery will be drained by HCW pretty fast.
HW/W versions have bigger footprints (Module Size:19.7X16mm) and not compatible with the "Button size".
HCW/CW (Module Size:16X16mm) are equivalents for HW/W.

Abdu Sahin

@yury
I think I can start with CW version as start. Battery life is important for me.

yury

@Abdu-Sahin said in 💬 Button size radionode with sensors swarm extension:

Battery life is important

sent you a message in the chat...

Abdu Sahin

@yury
You can email me if you like.
My email is uk.asahin at gmail com

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