Laird Sentrius RS1xx Series

Any support questions you might have can be asked here:

Is there a way to decode the payload directly in TTN rather than having to use NodeRED?

you don’t have to use node red … see
this is not a support question for this product

It is directly related to this device. The documentation from Laird only contains examples with node red.

Ideally was wondering if there was a way to decode the data directly in the console, like with the things node

Apologies for not searching the forums deeper. I found the same issue already reported… No Payload from Laird RS1XX

release v4.4_18-10-17 :

  • Add support to enable/disable confirmed packets.
  • Users can now select the format of the uplink data packet in order to meet the requirements of the MyDevices Cayenne application server. The original packet format from FW version 3.1 is included under the Laird option.
  • Added software watchdog timer to reset the sensor if it is not working as expected.
    • Bit 3 of the options byte is used to indicate if the sensor has reset.
  • Hold user button for 5 seconds to reset the sensor.
  • RTC time now requested via options byte in a data packet.
  • RTC requested immediately on connection and not on first data packet.
  • Immediately after joining the sensor now sends an extra uplink packet containing version information.
  • Previous configuration variables now retained from version 3.x to 4.x.
  • The sensor will now restart after disconnecting from Bluetooth if a setting has changed.
  • First uplink packet now sent at the currently loaded data rate and not the hardcoded value.
  • Reduce power consumption by only performing temperature check once instead of twice.

Hello! I think, i have bricked my RS186. I try to update the FW of my RS186 using BT. And it failed !
Now when I start the node, I have two led on and… nothing more
what to do?

Contact Laird support through their website.

Maybe this can help you @kelu28 Laird Sentrius RS1XX on TTN - Firmware update failure

No help or no response?

isn’t that the same problem as discussed here and mentioned before… Laird is investigating ?

Hi, I have the RS1xx running for some time now mounted outside. While the temperature measurement seems quite accurate, I am noticing the humidity is not in conditions of > 80%.

The RS1xx is using the Si7021 sensor and I happened to have the same sensor on a break-out board, so I wanted to compare things a bit. I went connect it with an Arduino MKRWAN1300 and put it outside next to the Sentrius.

The temperatures are almost equal:

But also the humidity measure are (unfortunately):

Those measures are from last night where we had no rain or even fog, despite that getting 100% humidity, which can’t be true. I saw the same on other days where my primitive weather station measured between 80-90% humidity.

Posting this to understand if anyone else experienced the same. The RS1xx seems to be a very well made device and would have loved to use it for some project if the measures were reliable.

Note its Relative Humidity vs Humidity! So for a given temp there is a ‘dew point’ at which water will condense out - dew will form. At a guess I would say if you had a cold surface outside at the time - say a car roof or window/glasshouse etc., likley you would have seen condensate forming from around <9pm through midnight (100%RH) and onwards through the morning till it started to warm up agiain.

Any variance/lag to the two plots likely due to the white gortex like covering over the RS1xx sensor vs what you have on the bare 7021 :wink: Plus device to device variance. As you note very consistent and I would concur with you from my own experience that the RS1xx is well made and reliable - I have a number deployed and have recommended/sold a few to others.

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Thanks for your reply, considering the dew point is a valid point of course. The Si7021 is not the first sensor I am testing and do not remember having seen similar behavior with the others, therefore my (eventually wrong) assumption was, the sensors would no be covered by condensate like glass or a metal surface is. Anyway, I am thinking to fetch some data from the next official weather station nearby in order to compare bit more in detail against the dew point - but that’s bit off topic here.