Can I use Cycle Analyst live data output and RASPBERRY PI to make a separate LED display?

[simplydata]

Hi!

I have been using Annalogger to store and analyze data for my solar trike. I am trying to check if I can possibly have a separate display so I can see some of the data(speed, motor watt, and solar input) on a larger display.

thanks!

 

[amberwolf]

Yes, but you'll have to build at least some of the hardware and write the software to do it.

There is someone over here:

Cycle Analyst V3 interface to Arduino Nano33 IOT

I want to input a throttle signal from an Arduino Nano33 IOT to a CA_V3. The Nano33 IOT is really nice; small form-factor, wifi, on-board IMU and has one analog output which I want to use as a throttle input to CA. The analog output from the Nano is a 0-3.3v signal and I don't want to fry the...

endless-sphere.com

that has built a system to use a Mega Arduino board to read two CA's data streams and modify the control signals to the motor controllers based on the data, so it's certainly possible to read the data stream realtime and operate on it.


There was also a project over here:

Cycle Analyst Android App

I was going to hold off posting anything about this until I had gotten farther along, but it's been over a week now and I've gotten it to work enough that I can't help but share. It's an app for the cycle analyst that currently acts as a display only. It is *VERY* basic and in its infancy: I...

endless-sphere.com

that read the stream live and displayed it on an Android device.
and his wireless telemetry system

Wireless Telemetry System

Hello all, just thought I'd share my solution for a wireless telemetry system using an Arduino and the Cycle Analyst, as well as xbee modules. I tried simply using the sparkfun xbee explorer board to the CA, but it wouldn't send the characters, although it was making the scroll bar get smaller...

endless-sphere.com

There is this one

Android app for Cycle Analyst

I offer you my version of the graphical application for СА. To transfer data to the mobile device I am using serial 2 WiFi module ESP 8266. This option has some advantages over bluetooth. 1. Significantly greater range, particularly when using an external antenna. This allows you to use the...

endless-sphere.com

but they seem to have deleted the actual program from the web though later in the thread someone else linked their version

and this one

My Ebike Android App (supports Cycle Analyst)

I've been working on an Android app for a couple of months now, designed to connect via Bluetooth to the CA and also to a 12-24S Bluetooth cell monitoring device I'm working on. It is not intended to be a replacement for the Cycle Analyst's own display, but more to allow some other live...

endless-sphere.com

but he never posted any software so you have to contact him (if possible) to get it.

Several threads have been started about projects like this, including mine here

"modern" display for cycle analyst

it's been discussed a number of times, and implemented in a few ways. but a more "direct" approach hasn't been done, of "simply" replacing the screen with something graphical. i don't have the skills to do this, but here's what might be able to be done: either one uses an mcu of some type...

endless-sphere.com

trying to get more interest in making something open-source to do this, but most of them just die like that one did with people posting unrelated things in them that don't do what is needed.

 

[simplydata]

Yes, but you'll have to build at least some of the hardware and write the software to do it.

There is someone over here:

Cycle Analyst V3 interface to Arduino Nano33 IOT

I want to input a throttle signal from an Arduino Nano33 IOT to a CA_V3. The Nano33 IOT is really nice; small form-factor, wifi, on-board IMU and has one analog output which I want to use as a throttle input to CA. The analog output from the Nano is a 0-3.3v signal and I don't want to fry the...

endless-sphere.com

that has built a system to use a Mega Arduino board to read two CA's data streams and modify the control signals to the motor controllers based on the data, so it's certainly possible to read the data stream realtime and operate on it.


There was also a project over here:

Cycle Analyst Android App

I was going to hold off posting anything about this until I had gotten farther along, but it's been over a week now and I've gotten it to work enough that I can't help but share. It's an app for the cycle analyst that currently acts as a display only. It is *VERY* basic and in its infancy: I...

endless-sphere.com

that read the stream live and displayed it on an Android device.
and his wireless telemetry system

Wireless Telemetry System

Hello all, just thought I'd share my solution for a wireless telemetry system using an Arduino and the Cycle Analyst, as well as xbee modules. I tried simply using the sparkfun xbee explorer board to the CA, but it wouldn't send the characters, although it was making the scroll bar get smaller...

endless-sphere.com

There is this one

Android app for Cycle Analyst

I offer you my version of the graphical application for СА. To transfer data to the mobile device I am using serial 2 WiFi module ESP 8266. This option has some advantages over bluetooth. 1. Significantly greater range, particularly when using an external antenna. This allows you to use the...

endless-sphere.com

but they seem to have deleted the actual program from the web though later in the thread someone else linked their version

and this one

My Ebike Android App (supports Cycle Analyst)

I've been working on an Android app for a couple of months now, designed to connect via Bluetooth to the CA and also to a 12-24S Bluetooth cell monitoring device I'm working on. It is not intended to be a replacement for the Cycle Analyst's own display, but more to allow some other live...

endless-sphere.com

but he never posted any software so you have to contact him (if possible) to get it.

Several threads have been started about projects like this, including mine here

"modern" display for cycle analyst

it's been discussed a number of times, and implemented in a few ways. but a more "direct" approach hasn't been done, of "simply" replacing the screen with something graphical. i don't have the skills to do this, but here's what might be able to be done: either one uses an mcu of some type...

endless-sphere.com

trying to get more interest in making something open-source to do this, but most of them just die like that one did with people posting unrelated things in them that don't do what is needed.

It seems like it is possible but no known completed project. I am not an expert and without some examples, I probably have to give up. Thanks!

 

[calab]

It seems like it is possible but no known completed project. I am not an expert and without some examples, I probably have to give up. Thanks!

Yeah reminded me of this phrase. No venturing off the paved path huh?

They get active, go getters.

 

[simplydata]

Yeah reminded me of this phrase. No venturing off the paved path huh?

 

[simplydata]

Maybe I can start from here.

ChatGPT

The Cycle Analyst V3 is a popular device used to monitor and control electric bicycles. It provides various data points related to the electric bike's performance, such as speed, battery voltage, current, power consumption, etc. To read Cycle Analyst V3 data using an Arduino, you can follow these general steps:

1. Hardware Setup: Connect the Cycle Analyst V3 to your Arduino using appropriate wiring. The Cycle Analyst usually communicates via UART (serial communication), so you'll need to connect the Cycle Analyst's TX (transmit) pin to the Arduino's RX pin, and vice versa. Additionally, connect the ground (GND) pins of both devices together to establish a common ground.
2. Serial Communication: Use the Arduino's SoftwareSerial library to set up a secondary serial communication port for reading data from the Cycle Analyst. Here's an example code snippet for setting up the serial communication:
   cppCopy code
   #include <SoftwareSerial.h>
   
   SoftwareSerial cycleAnalystSerial(RX_PIN, TX_PIN); // Define RX and TX pins
   
   void setup() {
   Serial.begin(9600); // Initialize serial monitor
   cycleAnalystSerial.begin(9600); // Initialize Cycle Analyst serial communication
   }
   
   void loop() {
   if (cycleAnalystSerial.available()) {
   char data = cycleAnalystSerial.read();
   Serial.print(data); // Print data to serial monitor
   }
   }
   Replace RX_PIN and TX_PIN with the actual pins you've connected the Cycle Analyst to on your Arduino.
3. Interpreting Data: The data sent by the Cycle Analyst will likely be in a specific format, often ASCII-encoded or in a structured protocol. You'll need to refer to the Cycle Analyst V3 manual or documentation to understand the data format and how to interpret it. Depending on the data you want to extract, you might need to parse the received bytes accordingly.
4. Data Parsing: If the data from the Cycle Analyst is in a structured format, you'll need to write code to parse the received bytes into meaningful values. This might involve using functions like atoi() to convert ASCII strings to integers, or other appropriate methods based on the data format.
5. Processing and Display: Once you've parsed the relevant data, you can perform any necessary calculations or actions based on the received information. For example, you could display the speed or battery voltage on an LCD screen, control LEDs based on power consumption, etc.

Remember to thoroughly study the Cycle Analyst V3 documentation and understand its communication protocol to ensure you're correctly receiving and interpreting the data. The example code provided is a starting point and might need modifications based on your specific use case and the data format used by the Cycle Analyst.

 

[simplydata]

I am able to read Cycle Analyst with just two pins. I may have something to work on.

 

[amberwolf]

It seems to be a start--the chatgpt "report" sounds like the right path, too. I don't know enough about coding to directly help (which is why I have not yet finished any of my own Nano projects).

 

[simplydata]

Update:
I am able to display the battery voltage now. I will try to display multiple items such as speed and more.

 

[amberwolf]

:thumb:

you've gotten about a hundred times as far as i have....

 

[Howlermonkey]

The problem with this platform is availability.

 

[simplydata]

I have finally had time to finish this small project. I just need to have a case for it now.

 

[amberwolf]

How did you end up going about it?

(and do you think you will publish the project, for others to replicate or modify?)

 

[riding_on]

Update:
I am able to display the battery voltage now. I will try to display multiple items such as speed and more.

I don't usually do embedded software, but I'm educated in it and do my best to work in the industry -- with varying levels of success depending on what season we're talking about. I'm happy to help if anybody has any specific questions; but frankly, it sounds to me like people might be better off with a cheap $20 ammeter from Amazon that displays voltage, amps, watts, and Wh off the shelf. All depends on what the finished project does, and what someone else is looking for

Disclaimer: I did very little due diligence before posting this, and am not seeing how it's much different than a CA3 (Cycleanalyst v3).

 

[amberwolf]

The CA3 does do those things, but it also does MUCH more than that; it's a computer that takes various sensor inputs, processes them based on your chosen settings, and outputs a throttle signal to your controller to make the motor do the things you want it to do in the way you want it to when you want it to.

Cycle Analyst V3 - Grin Products - Product Info

The Cycle Analyst display is our first flagship product released in 2006 and now in its 3rd generation. While the hardware design may be showing its age, it still has capabilities and functionalities that are unmatched by modern ebike systems with their pretty colour screens. This device also...

ebikes.ca

It also outputs all the data (or whichever fields you choose) via it's serial port, realtime, so you can log it (cycle analogger, etc) or use it for a dashboard (like the one in this thread or the various others linked in it).

So if you already have one on the system, but need a display other than the two-line text it has built-in, projects like this are an "easy" way to do that, and show you just the bits of info you want to see in just the way you want to see them.

 

[simplydata]

How did you end up going about it?

(and do you think you will publish the project, for others to replicate or modify?)

I just wanted to be able to see some data easierly front of me while riding. Since I have a trike, the CA is not front of me. I can share info if someone ask.

 

[amberwolf]

I can share info if someone ask.

Consider this asking, please?

 

[Developer_Joshua]

I have a different use case for all of this, but this has all be externally useful.
I have an Electric Vehicle Race, and we are trying to take this data into a raspberry pi. Thank you for all of your work!

 

[amberwolf]

I have a different use case for all of this, but this has all be externally useful.
I have an Electric Vehicle Race, and we are trying to take this data into a raspberry pi. Thank you for all of your work!

If all you want to do is get the data from the Cycle Analyst into the RPI, it's just seriial data at whatever rate you set up in the CA. Just use a serial input of the RPI (or any input that can capture toggling 0v-5v at that rate), and do whatever it is you are doing in the RPI to process the data however you want. The data format is in the CA manual, etc.

If you only want to log the data for later processing, you don't even need an RPI, you can either use the Grin Analogger from ebikes.ca or a board like the ones in my post here
https://endless-sphere.com/sphere/threads/cheap-ca-data-logging-with-phone-or-pc.74764/#post-1786083
or the other project that thread is about.