Unpack hex-encoded binary data in PHP
We’re collecting data from a partner’s IoT devices and the data comes encoded in a hex string like 1C000000010028 which contains binary data: Byte 0 bit 0 Boolean Byte 0 bit 1 Boolean Byte 0 bit 2 …
Tag: iot
How to add CORS-Header to my esp32 webserver
I have the Problem that I cannot fetch() from my created .json because of an Access-Control-Allow-Origin Error. I found out that I have to create some kind of a header, but I have no idea how such a …
Grandeur Cloud “signature invalid” error after apollo.init()
I downloaded Grandeur Cloud’s datastore example from their github (https://github.com/grandeurtech/examples/tree/master/Datastore) and replaced the API key with my project’s key, created a signature …
Implementing a IoT Device Pairing process in Android over Wifi
I am currently working on the integration of IoT devices into a cloud. Many people know the Gosund smart plugs. Just for fun, I’ve been playing around with the original firmware and wondering how this …
OTG vs Usb extension cable?
Is there a difference in OTG and Usb extension cable? I’m trying to connect my Android phone with some IoT device and when I connect it via OTG cable it works fine, but with regular extension cable …
can not connect to aws iot device with react native
i am building IoT app with react native. used this package https://github.com/aws/aws-iot-device-sdk-js but got error while running app import React, {Component} from ‘react’; import {…
Deploying MQTT broker on Android?
I see that a lot of questions about deploying a MQTT broker on Android get asked about their purpose and eventually get voted down. Is it not a good idea to run the broker on the phone so that IoT …