A web-application to control a fan by a photon. The web-application controls fan's state and provides it to photon.

The photon makes a HTTP request to the node.js-app and gets back a simple line of text containing the desired fan level. The line looks like this:

FCS4FLV1PWR0095HR110SPD027.3

At 8th position the fan level is tramitted (eg. 1).

FCS meens fan controller state which represents one of different modes of operation:

0 fan off

1 fan level one

2 fan level two

3 fan level three

4 Zwift simulation: according to the nearly actual speed ridden in Zwift the fan level is set. Fan levels are configured in configure.js

module.exports.speedLevel1 = 10;
module.exports.speedLevel2 = 30;
module.exports.speedLevel3 = 40;

5 Zwift workout mode: the fan level is set dependent from power in Zwift if heartrate is above a defined level configured in configure.js

module.exports.heartrate = 125;

module.exports.powerLevel1 = 150;   
module.exports.powerLevel2 = 200;   
module.exports.powerLevel3 = 250;   

Thanks a lot to Just Vervaart and Ogadai.

Following sections describe how to install node.js app and photon firmware.

1. Clone or download this repository to the host with node.js installed where you want to run the app.
2. Install dependent packages eg. npm install.
3. Configure the app with file configure.js as described above and you like. There are a few more comments inline in config file.
4. Run the app with npm start.
5. Open the app with a browser http://localhost:3000 or use the IP of the host, if you want to call the app from your mobile phone from within the same network, which would be the case if your host and mobile phone are connected to same Wi-Fi network.

1. Run the app with npm start.
2. Normaly you would test the app not riding on Zwift. You find the playerId of another rider from log file ./log/fancontrol.log from within the folder where you cloned the respository. There's an line with playerId: [5-6digits].
3. Copy the playerId from log-file to the configuration configure.js
4. Now restart the application.
5. Open the app with a browser http://localhost:3000 or with an mobile phone.
6. Tap button Get Fan State.
7. You should see a string like this: FCS4FLV1PWR0095HR110SPD027.3. If all values are zero, stop the application and repeate from step 2.

This is a short description on how to install the particle app on the photon. Assumption you have a fan with different speeds, a photon, a particle relay shield and a DC adapter.

Use these instruction at your own risk. Be carefull working with deadly currents

The picture shows how the cabling of the relay shield could look:

The fan's power cables are connected to the DC adapter. Connect the DC adapter to feed the relay shield. Be aware of the polarization. Furthermore the phase (brown) of the power feeding cable is connected with the relay's COMM ports. The neutral (blue) of the power feeding cable is connected with the neutral of the fan's electro motor. The fan motor cables of the different speed levels are connected each one to a NO (normally open) port of an relay. Remember which cable is connected to which relay. The relay shield connects each relay with a digital pin. You find the number of the digital pin next to the relay (eg. D4 next relay 2). Remember the pin numbers you choose.

1. Create an particle app in Web IDE (eg. "FanController").
2. Copy code from file photon-src/fancontroller.ino from repository to Web IDE.
3. Check and eventually replace the definition of RELAY2, RELAY3 and RELAY 4 according to your wiring.
4. Set HOST_IP and HOST_PORT according to your settings. Choose the IP address of your host running the node.js app and port 3000 or the one you choosed.
5. Flash the code to the photon.

If the photon is connected to a PC by USB you can use Putty to see log statements.