I’m very new to this world
I want to Log Compass data using this boards.
(Compass HMC6352, Logomatic v2 Datalogger)
But not only “Compass data” also “current speed” through a propeller and “pressure” and “temperature”,
This is going to be use under sea.
Is it possible to connect all this 4 sensors at the same time?
If it is possible:
Can you show me where I will solder these equipment on the DataLogger Board.
Thnx.
I am certainly not an expert, just having received my Logomatic in the last month, but to answer your questions, you need to understand how your sensors communicate.
If they have analog outputs (probably not), then you just need to wire the output lines to the analog inputs of the Logomatic and select Mode 2 and run!
If they communicate via simple RS232 lines, then you are also lucky (at least for two sensors) and you can wire up to the UART 0 and 1 ports on the logomatic board, then set the baud rates and run mode 1 (at least to log from UART 0 I think).
However my guess is that you are in the same boat as I–I have the ADXL 3 axis accelerometer which communicates digitally via SPI or I2C serial communication. I am choosing I2C because I also have an airspeed and altimeter sensors (from Eagletree) which also communicate via I2C. For this I need to re-task an output or two (especially one of the blinking led’s which is also using the port for the I2C interface. Also need to adapt a I2C driver which I downloaded from Keil. So this is reasonable effort.
Also want to input an rpm sensor—this puts out pulses, so I will need to retask some connections for a counter.
Finally I may actually want to output a PWM signal at 50Hz, so again it means I have to find one of the PWM output ports with pins not already used by something necessary (like the SPI interface to the SD card).
And more software!
So it isn’t trivial.
It would have been nice if the board was laid out to support at least one of the two I2C interfaces, considering how many of the new sensors are readout that way. But it is as it is. In my case it is possible that the package tracker might have been an easier board to use initially, assuming I could update the logging rate to the 20Hz range. But even there, I would eventually had to make some physical modifications to the board connections.
Hope this was of some help.