Sorry for late reply.
I had Fluke ir3000 FC & Fluke 287 lying around for a while but just recently got into Python "programming".
To make long story short: using the micro USB and some kind of serial terminal you can "spy" the data that is being sent from ir3000 FC to the Bluetooth receiver (i.e. smartphone with "Fluke Connect" app).
How I did it:
- plugged the ir3000 FC into Fluke 287 and then connected it via this micro-USB to PC, (switched both ON, the PC indicator on F287 LCD should blink)
- noticed a new "USB Serial Device (COMx)" that appeared in Device Manager (I use Win10)
- in the terminal of choice (I wrote a tiny Python script instead), picked the newly available virtual COM port and set the baudrate to 115200 standard for Fluke 28x series
- started the Fluke Connect app
- depending on how you set up the EOL (end of line) you can receive 2 kinds of messages in the terminal:
-> by EOL = "LF" (b'\n', or 0x0A) you will get the radio link "status" (keep alive message?), which is sent approximately every 10 seconds:
example:
"radio bound, fi connected" or "radio unbound, fi connected"
this message is sent all the time, not depending on the Bluetooth connection
-> by EOL = "CR" (b'\r', or 0x0D) you will get namely the "spy" between ir3000 FC and Bluetooth device. This communication is only visible when you are
actually connected to your Fluke device in the app.
example (the DMM is set to VDC, showing around "0.0001 VDC" on screen / in the Fluke Connect app):
"SYS INFO:SPI RX:TIM=0006234123:NOTIFY:PH=05
SYS INFO:SPI TX:TIM=0006234368:NOTIFY:PH=110101000008020C00000000000000000000"
If you set the EOL to "CR" you will see the keep alive messages as well.
If you disconnect the meter in the app you will see following log:
"SYS INFO:SPI TX:TIM=0009576262:NTWK CTRL:Read ISW
SYS INFO:SPI RX:TIM=0009576264:INT DATA:PH=0010
SYS INFO:ISW=0x0010:TIM=0009576264:INT=Terminate Bound
SLAVE EVENT:Unbound:TIM=0009576265"
(the log by connecting to the meter in the app is similar to that)
I've tried also sending the commands to the meter, but only the "ID" comes through:
"CMD RESP:Ack=7:ID:FLUKE IR3000,V01.00.15,-0001"
Despite this whole issue is kind of interesting, it has very limited use, especially if you have a Fluke IR189 USB interface.