SunSPec 5 - Telemetry System

WEMOS D1 Mini Pro December 8th, we received a WEMOS D1 Mini pro module from Mr. Joe to play around. We were tasked to replicate the simple task of controlling the LED using a web server  created when a program is run by the WEMOS. This is the same program done by STEM Education on their Internet of Things Blog. Figure 1: WEMOS  Unlike the ESP-01 like before, this WEMOS has no need for an FTDI power converter. Where the ESP01 requires different configuration for AT command mode/ serial monitor display/ downloading of program, the WEMOS is able to connect a COM PORT simply and have serial monitor display/ downloading of codes done without much hassle. Figure 2: Serial Monitor indicating connection to SSID The displayed serial monitor is able to indicate the WEMOS being connected to the Local WiFi network as well as showing the IP address of the WEMOS to connect to the web server. The web server is created by the program and a...

Introduction: As week 7 was used in preparation for MST, week 7 had no update on telemetry. After attempts on working with the RedBear Blend had been unsuccessful. Mr Joe assigned us to work with an ESP specifically an ESP01. An ESP functions as an Arduino with a wifi module and cost less than $3. However, it has only 2 IO ports and 1 built-in LED. We were tasked to connect an ESP01 with the DHT22 temperature-humidity sensor. The ESP01 would receive the data from the DHT22 connected to an Arduino and display it on a Serial monitor. The previous attempts had been unsuccessful due to firmware issues which resulted in failure even entering AT command mode. This was solved by Mr Joe uploading a firmware inside it but that ESP could only enter AT command very few often. As such, we focused on various other components such as HC-05/HC-06 as well as the Bluno beetle.  Up until recently, we started back with new ESP01 that Mr Joe had g...

Bluetooth Module We were given out another type of Bluetooth modules, the Bluno Beetle. We were told that multiple slave Blunos can be paired up to a master Bluno simultaneously, however, turns out to be false. After some testing and research, it is found out that one master Bluno only allows up to one slave Bluno as the first slave Bluno paired up will be disconnected. One possible solution to counter the problem was through "switching" of the slaves. It is coded such that the slaves will be programmed to pair up with the master in succession while disconnecting the prior paired one. The Bluno beetle model is faster, smaller, and easier to set up as compared to the HC models, but of course, the cost is relatively higher too (around 7x the price of an HC-05). One major problem encountered when dealing with the Blunos was the disconnecting of Arduino ports. Each time the code is uploaded, the port disappears. Despite changing USB cables and Arduino bo...