Week 3 Activity - Working on optocoupler & Internal Transmission (Bluetooth)

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We spent some time arranging the components found from T1023 and W13 that will be useful for our project and placed them in boxes. 

Figure 1: Telemetry components from W13
Figure 2: Boxes of sorted components
We accidentally soldered wires onto the optocoupler board instead of headers and had difficulties removing them, where we broke some of the tracks in the process of removing the wires.

We met up with our supervisors on Tuesday, we were then briefed and given the HC-06 FC-114 and RedBear Bluetooth modules to test. It is then found out that HC-06 can only be used as a slave module, whereby the HC-05 is required to be used as a master module. We went to Sim Lim Tower's Amicus Engineering to purchase 3 HC-05 FC-114 Bluetooth modules on Wednesday.




We faced several problems with the Arduino IDE after trying to set-up for RedBear. >:(
We are able to enter the AT mode for HC-06 FC-114 and upload the code onto the board.
Whereby the LEDs on the module will be blinking fast (several times per second) when the module is being powered up. However, all the AT commands at Serial.Monitor are not responding at all >:((
One possible reason we can think of is that of incorrect connection of the Arduino as we are using Leonardo while the online examples are all using Arduino Nano. After finally getting the Bluetooth modules paired up and working, they are able to send and receive messages to and fro. However, after re-powering up the modules, the messages sent are in weird symbols. It is then found out that it is due to incorrect baud setting in the program. Whereas the reason for the initial working of the modules despite incorrect baud rate is unknown.

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