Hi, my ultimate goal is to have two photon boards to communicate with each other wirelessly, without the use of any other devices other than the two boards (e.g. no external AP). My approach is to connect photon 1 to photon 2’s SoftAP, and have them communicate via TCP. I encountered the problem t…

WiFi.localIP() does only get set when the device connects to a network, not when the device itself establishes the network (acts as as AP). SoftAP by default exposes an IP address 192.168.0.1 and that cannot be changed as it is part of the 3rd party WICED firmware. Also raw TCP is not (fully) supp…

Hi @ScruffR , thanks for the response. To get a sense of what I should do next, I would like to ask a few more questions. SoftAP by default exposes an IP address 192.168.0.1 and that cannot be changed as it is part of the 3rd party WICED firmware. Does it mean I could configure photon 2 as a TCP …

[image] paul300: Could you elaborate a little here? The WICED SoftAP implementation features its own HTTP server but does not (fully) service any concurrent TCP connections. When you want to communicate between the two devices you may go via the HTTP route facilitating the stock HTTP impleme…

@ScruffR It seems using the default implementation of the HTTP server is the only way of communicating between two photons when one is connected to the other’s SoftAP :frowning:. What I intend for my two photons to do is essentially that photon 1 will send sensor data to photon 2, which will send b…

[image] paul300: from what I read on the API, the HTTP server only allows the hosting of a website with the feature to set up wifi credentials. Not quite. You can modify the hosted website and use these to communicated your custom data. I've done exactly that in some example implementation …

As another option, both Photons can connect to an existing Wi-Fi network and not connect to the cloud. You just need to only bring up Wi-Fi only (WiFi.connect()) instead of the cloud (Particle.connect()) and the devices will breathe green instead of cyan. Then both devices have the full ability to c…

For this implementation, what’s the code for the client photon to POST data to the HTTP server?

My feeling is that the SoftAP server only supports GET requests, but you still can send data to the server as GET parameters.

Thanks. What’s the code for the client photon to perform the GET request? I saw an example of a GET request ( https://www.digikey.com/en/maker/blogs/2019/how-to-post-data-using-the-particle-photon ): client.println("GET /dataValue.html HTTP/1.0"); client.println("Host: maker-io-iot.atwebpages.com");…

You can use the IP address Or you use HTTPClient to care about the forming of the request for you :wink:

I tried the following code on the client but the server didn’t receive the request, what is wrong? client.println("GET /index.html?str1=1 HTTP/1.0"); client.println("Host: 192.168.0.1"); client.println(); I tried HTTP/1.1 and 2 too. With the "Host: " I tried http://192.168.0.1 as well.

Assigning static IP for photon in listening mode

Connectivity WiFi

ScruffR September 5, 2020, 7:18am 6

Not quite.
You can modify the hosted website and use these to communicated your custom data.
I've done exactly that in some example implementation quite some time ago.

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Assigning static IP for photon in listening mode

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