(Vanthome) #84

Because the uCurrent Gold is often out of stock and we needed some additional features, we have introduced the tinyCurrent as an alternative.



Recently I received this Expert RF Powermeter from Russia.
The device was sealed in shrink foil and send in a plastic container together with 2 attenuators and a pigtail cable.

You can use this tool to check if nodes are transmitting and to obtain an indication of the transmission power of these nodes.

The RF Powermeter has different, fixed measuring frequencies and it is possible to view the transmission signal in what’s called the “Fill Mode”. In addition, other measurement settings are also possible (see specs in link below)


Power output RN2483 (Microchip mote)
You can switch the readout in mW or dBm. Unfortunately, the value in the display is only visible for a short period of time during the transmission, so during the measurement you should pay attention and watch the screen.


Power output ESP32 Heltec node
10dBm?? I have measured several Paxcounters … some came to 8 mW.


Fill Mode measurement DR5 SF7

Fill Mode measurement DR0 SF12

My 3D printed enclosure

RF Powermeter

(Vanthome) #86

There is a new alternative called tinyCurrent with some nice enhancements like BNC connector and possibility to increase the dynamic range by up to factor three.


yes… we know :wink:


According to the listed specifications the dynamic range can be increased up to factor two (2.04).

(Vanthome) #89

Let me detail this:

With just a CR2032 battery you can double the range by tweaking the voltage divider’s ratio – 1.5V vs. 3.0V.
When you hook up an external power source with 5.5V (possible through the JST connector) then you can actually achieve factor 3.66 – 1.5V vs. 2.75V.

Bonus: you can overdrive the thing for up to 6.5V or even more (voiding warranty) :wink:


Voiding warranty is a bonus? :thinking: :wink:


How to drastically improve battery life of an EEVBlog uCurrent Gold



(The Hobo) #94


This might be a noob question, but any idea how they did the power profiling on the picture ?

RAK 5205 tracker

probably this tool

(The Hobo) #96

Oh I found the tool, watched the tutorial, however from what I understand it is for Nordic products only and you need a profiler kit board, etc. RAK5205 is basically RAK811 (STM32L). So that is the part I do not understand. How are they using the software with a hardware that seems to bot be supported. Again probably a noob question.




@azazeal is using this tool - Anyone tried Laird RM1XX modules ? part 2

(Eric VdB) #98

So, is this a auto-ranging “µCurrent Gold” with some fancy desktop application with graphing and logging? If so, that sounds interesting for ~73€ :thinking:

(Jac Kersing) #99

No it isn’t. Read the specs carefully before buying. Specifically the voltage and power ranges. Then look at what is required to use it. (Next look for another solution :wink:)


Hand tools for U.FL / I-PEX Micro RF coax connector extraction and insertion

See ‘Hand tool’ on page 5:


grip with antenna only :