I have an Arduino MEGA2560, I hooked it up to a BLE module HM-19 through serial. I can send AT commands and receive responses from the HM-19 successfully.
I have a BLE Smart wristwatch. This BLE smart wristwatch stores my Daily steps, Heart rate & Blood Oxygen.
I can send AT commands to my HM-19 BLE module to successfully connect to my BLE Smart wristwatch. However, after connecting/pairing the HM-19 and the smart wristwatch there doesn't seem to be much I can do.
Question: What AT commands do I have to send to read the wristwatches BLE services and characteristics?
I want to read the daily step counts, heart rate, blood oxygen, battery percentage, etc.
Does anyone know how?
From looking at the documentation for the HM-19 module it looks like it might be difficult to do what you are looking for as the product looks like it focuses on supporting UART over BLE.
The only customisation is what UUIDs are used for the two UART characteristics.
Related
We are looking at using the Telit BlueMod+SR chip in a hardware idea we are working on. Towards that I've been trying to build a Bluetooth Low Energy (BLE) server simulation using the Telit BlueEva+SR evaluation board driven over USB by a Python script.
The two relevant manuals appear to be:
BlueMod+SR AT Command Reference
Terminal I/O Profile Client Implementation Guide (though I'm implementing the server)
(N.B. these are available here but are behind a register/login.)
I'm stuck on something basic: how to send or receive data. I understand that this is done by setting the value of a Generic Attribute Profile (GATT) service's characteristic. The BlueMod+SR already has the GATT service characteristics that I need (a UART data TX characteristic and a UART data RX characteristic) on its Terminal I/O Service. The UUID's of the characteristics I need are given in the Terminal I/O Profile Client Implementation Guide but I cannot see how to read from nor write to them. The AT Command Reference has a section on GATT Server commands but the only one listed, +LEATTRIB, is for defining the attributes for a service (and the ones I need are already defined).
What are the commands I need to read and write the values for the characteristics UART Data TX, UART Data RX, UART Credits TX, and UART Credits RX?
It turns out that I did not need to use the credit mechanism, that's handled for me. So to write to the TX characteristic I can either connect to BLE and just write the data, or use the multiplexing and write the data to channel 0x01 (Terminal I/O). Reading the RX characteristic si similarly just reading the serial connection.
I am new to Arduino and I would like to do a project that sends data, remotely. So, the Arduino would not be connected to Wifi/Bluetooth, Ethernet, etc. Would using a GSM shield be the best way to transfer data? I do not need to make phone calls or send SMS (unless sending SMS would be a better, more reliable, option) just data to a server, who's app I would create. If this is the best option, what else would I need to make this happen? For example, on top of the GSM shield (I am looking at something cheap like this: https://www.amazon.com/Geeetech-SIMCOM-Quad-band-Development-Arduino/dp/B00A8DDYB6/ref=sr_1_2?ie=UTF8&qid=1467651878&sr=8-2&keywords=Arduino+GSM+Shield) what other charges would I need to pay? I.E. would I also need to get another phone plan? Would I have to pay for a gateway service that would receive the cell phone data and then send it to my server?
Thanks your any thoughts on this
Wifi, ethernet or GSM, it depends on what you want to use, and what you have.
With all three you can send data to a server.
There is a bench of Arduino shields. All shields from Arduino come with a library to handle communication.
Other shields from other vendors exist and they provide their libraries too.
For Ethernet you can check the arduino shield https://www.arduino.cc/en/Main/ArduinoBoardEthernet.
For Wifi there are plenty. You have first the arduino shield. You can also take a look at the CC3000. Or the famous ESP8266. For all three you can find libraries.
For GSM, Arduino has a shield and a library. Arduino uses the Quectel M10 GSM moduel. You can find lots of examples in the arduino website and all over the net (https://www.arduino.cc/en/Guide/ArduinoGSMShield).
There exist other shields like the one you mentioned. Libraries does exist for those "other" shields however they are not as maintained as the arduino one.
You need to be careful though, you'll find over Amazon (and most likely on Alibaba) some GSM modules like SIM900A that are way cheaper, those are only dual band and will work only on certain contries.
There is another cheap GSM Module called the A6. It was made by espressif the company behid the ESP8266. It's relatively new and no library exist for it at the time. You can write you own functions to use it, but that would be some extra work.
In all cases, to use a GSM module you'll need a sim card with it's phone plan and all.
Another thing to consider is how to power these shields. They use more power than an Arduino can generate (A GSM modules datasheet recommend to use a power supply that can deliver up to 2A). If you power them straight from the Arduino, you may encounter some strange behaviour.
So the ideal way is to have for them an external power supply with the required amps and have a commun ground with the Arduino.
I have some sensors connected to my ardunio uno and get periodically data from that sensors now I wanted to send that data to cloud.
I dont have any idea about how should I connect my arduino to Internet using GSM. How should I solve this problem or any alternative is there.
Just get an appropriate shield (like this one) and follow the documents included with it. The linked shield includes some basic service plan as part of the purchase. Once connected, it's just like using any other TCP/IP application.
The ArduinoIDE writes firmware to my Arduino UNO but I want to handle logic and code outside the microcontroller on the computer with the microcontroller strictly being a sensor and the computer handling the logic.
How can I have the computer handle the logic and listen to sensors (output data to a computer) and respond (input commands to the board)?
Is this done with serials? How do I get started with this?
I know how to code, I just need help understanding how to get the hardware to talk to one another. Arduino to computer, computer to arduino.
For example, I have a thermal sensor on the board, how can I have bi-directional communication where the output of temperature would go to a program on my computer and respond to the board to turn on an LED or other command based on statements on the computer.
All help is appreciated.
There is a tutorial on arduino.cc how to read a sensor on arduino en display the values in processing.
There is also a tutorial to turn on a led with a command from a pc.
If you want to do real complicated things I suggest that you take a look at Firmata
What I have in mind is having a number of sensors (temperature, accelerometer, sound level meter) that are controlled by a micro controller. What I want to do is take this information and transmit it wireless to a laptop that will take this information and put it on to a web server using Zigbee. I don't know where to start.
Since you don't have any hardware as of yet, you might want to give the Arduino a try. The hardware is affordable, can be connected to your system via USB while being programmable in-system.
The basic board can be extended via so called "shields", which offer additional features. In your case, the XBee shield would be appropriate. Connecting your laptop to a XBee module is as simple as using Sparkfun's breakout board and a mini-USB cable.
The Arduino has a large community, so you will find a lot of resources, like books, online material, example code etc.
We also provide wireless modules that can be used for serial data transmission. They can be found at www.starmanelectric.com Our modules are very similar to the xbee, but more plug and play. They can be a great for going wireless for the first time. Our devices are designed to function like a "wireless cable" so if you're used to using wires then you'll be up and running in no time at all. We also have circuit examples for transmitting to a laptop serial port or USB. Any micro-controller will be fine for this application, as long as it has a serial port and a few ADCs to sample your data. Our modules also provide simple analog in/out which can run in parallel to the serial. If you want to compare to other systems, I would google "wireless serial modules"
Regards,
Michael
Starman Electric