The WORKBENCH part 1

End Devices (Nodes) Hardware
35

Yes I’ll mount a fuse between AC and the HiLINK.

X488

Also a 2 color LED, red on power on (plugged in) and green flashing when it can reach a gateway, green continue when the coffee machine/tv is on and a notification is transmitted.

These HiLinks are very good (tested before) , but I’ve never used them on a node, I’m more concerned about possible noise interference with that hall sensor, test before mounting everything :wink:

up to 200 mA load the voltage and ripple are fine.

X489

36

Wanted to use them in a nrf setup (mysensors). Some tips on fuses (thermal and slow) in this link https://forum.mysensors.org/topic/1607/safe-in-wall-ac-to-dc-transformers

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38

the coffee spy node project is not abandoned but @ the moment other stuff todo :sunglasses:

2 Likes
39

rs-dev21

40

rs-dev22

328p + RN2483 + Si7021 @ 1.5V :

high - 20mA
low- 50uA

43

rs-dev23-2

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44

x509

and some fiddling with different sensors

x508

my own gateway is under reconstruction… but still this node is received by 3 other gateways

seen by 03

but probably I’m in a good location and… this 5 dbi antenna give me the best node results sofar.

x511

45

live03
live01

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46

’ HOUSTON … we’ve got a problem ’ after the first night camping outdoors :wink:

problem

how’s that possible ? … a humidity over 100% , is it ME or TTN or CAYENNE or a monday morning Si 7021 sensor

noproblem

a few hours later ( 5 min interval measurements) and its getting better… we’re not 'under water ’

so my question is to you is what is the best outdoor arduino temp / humidity sensor ??

  • update … there is a sensor problem
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47

This one I suspect:

This channel is an absolute goldmine for Espressif, ESP, sensor, protocol, Arduino IDE, library and many other related facts and fixes.

G

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48

tnx… still a bit expensive, this afternoon I’ve tested a BME280 … positive :slight_smile:

live06

2 Likes
49

fresh start this morning with new code and a new sensor… the BME280

live09

and a new public dashboard address

live08
that silicone kit is for protecting the cheap chinese sma connectors from rusting :rofl:

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50

BME280 seems accurate, also the ‘over 100% humidity’ didn’t occur

live10

51

Payloads is the same as frame counter?

52

yes :sunglasses:

* changed it

firstnight

it survived the first night so I leave it now and just let it do its job… for how long it will run on a normal AA battery ?

1 Like
53

What are you using as the air purge valve? I’ve found a few but they either come in at about £15 each or I have to buy 1000 from Aliexpress…

54

drukcompensatie-element-m12-polyamide-lichtgrijs-wiska-evsp-12-1-stuks

55

here are 4 frames received by TTN gateways from the above BME280 testnode
at what RSSI level its no longer added to the application metadata ?
frames55x

this is part of the CayenneLPP buffer code from this sensor.
why is the sequence different in the metadata ? 3 4 2 1

p-meta sequence

56

RSSI does not determine whether data is included. Packet being from gateway received within deduplication timeout is what matters. Packets received after the timeout are discarded as duplicates.

1 Like
57

thnx Jac.

and what determines this ’ deduplication timeout ’
… a lot of packets from that specific GW, is that possible, a ‘slow’ responding GW with a good rf signal ?

now I understand the following (a little bit) better :

during testing of this node firmware, I had one day my own gateway on, OTAA joining worked fine and when I switched my gateway off the packets were seen by 3 other gateways (sometimes only one)

next day, I had my gateway still off, I started the node again… no OTAA possible but join request visible in application ??
switched my gateway on, re started the node, no problem joining, switched off my gateway…

e voila… packets are seen by 3 gateways.
my conclusion sofar… always start your node close to a gateway :sunglasses: