Is there an connection diagram of the FLM02B ?
I already know that:
Port 1 is for analoge only (0 - 5Vdc on - and +) for Ampère clamps
Port 2 is for analoge or puls (- and +)
Port 3 idem above
Port 4 is for puls only (- and +)
Port 5 idem above
Port 6 is for dutch smart meters (a and b)...and other perhaps...
I measured on port 6a = 5Vdc between one of the negative puls ports (-) is that correct ?
Can port 6 be used for other purposes, perhaps with an configuration ?
Can port 6a be used to supply Vcc to an photoelectric switch with or without an comparator like on model FLM02a ?
How many mA can be used through that 6a connection point with 5Vdc on it ?
That last question is to be sure not to overload the FLM (GPIO ... ?) if i use port 6a :D
Port 6 on the FLM02B is connected to the UART port of the Atheros SoC via XOR logic gates. These XOR's allow us to invert the UART Tx/Rx signals if needed. A UART Tx uses inverted logic, it will read high when sending a logic low, hence the 5V on input 6a you're measuring. We use a 74LVC1G86 for the XOR. The data sheet states +-24mA output drive at 3.3V. Output drive for 5V should be similar.
Thanks to Fluc and Icarus75,
with this information I was able to connect my Grove - Infrared Reflective Sensor to the FLM02b for monitoring my water consumption without a external power adapter.
Thank you Icarus75 for the clear answer and for the data sheet.
@Wizzopa, how many mA do your Grove / Infrared Reflective Sensor need to work well ?
Fluc,
According to information on this site http://www.seeedstudio.com/wiki/Grove_-_Infrared_Reflective_Sensor
Voltage：4.5-5.5V
Current：14.69 - 15.35 mA
My measurments ;
Voltage: 4.56v
Current: 19.47 mA
Device used for measuring: Nieaf Nl99 II True RMS Multimeter
And i supposed you connect this way:
Vcc on port 6a
Gnd on one of the puls ports -
Vout on one of the puls ports +
I don't think it could be possible to connect 2 such sensors both on port 6a ?
Fluc,
In my opinion No