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QUESTION
I have an android device and I'm trying to make a web app that will communicate with it (send json etc.).
I have made an api service that will send either a post or HttpRequest but I got stuck because I'm getting errors like bad request and connection failed. Both my notebook and the android are connected to the same wifi wirelessly and the android device is connected on a static ip address.
Here is my api service:
...ANSWER
Answered 2021-Jun-14 at 10:48this is my logic for sending the request:
QUESTION
Started to develop a wiresless 'cable' solution (with websockets) between two ESPs, a wireless serial 'cable' between computer and a serial device to mimick a direct wired connection. Was working great however just accidentally fried one of the ESPs (short a serial cable connection to higher voltage - sigh) when testing. Replaced one of the ESP32s with an ESP8266. Suspect this should work however it did not.
The problem is the ESP8266 (client) cannot find the network of the ESP32 (server). Why it doesn't work? My computer can see the server and can connect. Fried ESP32 the same, no problem.
Tried the WiFiScan demo on the ESP8266 and can detect all other WiFi SSIDs/MACs in neighborhood however cannot detect the ESP32 server it's SSID/MAC.
Why it doesn't work? What is the difference and how can I solve this?
ESP32 - code of the server
...ANSWER
Answered 2021-Jun-14 at 07:45WiFi channels 12-14 are not used in some countries (e.g. US). Perhaps the ESP32 AP picked one of those channels, and ESP8266 is configured by default with settings from a country which doesn't allow them. Set the AP channel to some reasonably safe value in range 1-11.
I can see that the default channel should be 1, but I'd suggest experimenting with it, perhaps setting it to 6:
QUESTION
I have a raspberry pi 4 running a tomcat server hosting my website. Right now it's blank, and I wanted to do connection tests on it before starting to build it. I am doing this to keep costs minimal and to be able to do other things with it later. However, as you can see in this image, I thought this was the way to set it up, but I get a 522 every time I try to connect to it. (I have IP blurred as it is my home IP). But, when I connect to the IP address directly, even through another wifi network, the page loads. Cloudflare has worked in the past when I was hosting on Google Firebase for a little bit, but once I switched to the pi, it stopped.
Thanks in advance for help.
...ANSWER
Answered 2021-Jun-14 at 03:27Cloudflare 522 errors are commonly caused by a wrong SSL configuration for your domain.
If you do not have HTTPS enabled locally, then you need to use the Flexible
SSL mode. If you have HTTPS enabled then you need to switch to Full
mode.
- Choose the domain and go to the SSL/TLS tab
- Select the right SSL mode depending on your setup and validate if it works.
You could have been using a different configuration when you were with Google.
See this link for more info: https://developers.cloudflare.com/ssl/origin-configuration/ssl-modes
QUESTION
I am using this code to get the ip address in Node.js:
...ANSWER
Answered 2021-Jun-08 at 07:42What you could be looking for is Local Area Network Ip address:
You could use default function by Node.js os.networkInterfaces()
You could find the documentation here:
https://nodejs.org/api/os.html#os_os_networkinterfaces
You could also look into this thread:
Get local IP address in Node.js
QUESTION
I'm actually programming something that won't let the user access to android native wifi connecting page, so I'm programming it inside my Android app. It scan the available Wifi Network, display it in a ListView, and then you click on the network you want to connect to.
Actually everything works well beside my connection function, which makes my app crash, so if you have any idea... Here is the code (this is the function that is called after the user has enter the network pass) and the stack trace :
...ANSWER
Answered 2021-Apr-30 at 14:01So here is the full code that works now, after the help of @LevM. and a bit of self researh. I post it because I did not find much solutions to connect to specific Wifi network in Android on internet (SO, Youtube or whatever) so if it can help at least one dev some days, I'll be happy ! :D (Note : I'm a student programmer, I'm not saying that this solution is the best but it is functionnal at least)
I had actually an issue with my wifiManager not being initialized. And then I deleted the wifiConfiguration list loop, I realized I didn't needed it. Finally I added String Format on SSID and Password since they need to be inside anti slash (" \ ").
QUESTION
I am trying to connect to my wifi using my M5StickCPlus. I use the platformIO framework. I am getting this error : error: invalid conversion from 'const char*' to 'char*' at compilation.
Here is the code:
...ANSWER
Answered 2021-Jun-13 at 01:55The WiFi.begin()
function overload that takes two arguments (an SSID and a password) requires the first argument to be a non-const char*
pointer (i.e. a pointer to a potentially modifiable char
array, even if the function doesn't actually change it).
A simple way around this (similar to the example given in the documentation) is to redeclare your WIFI_SSID
variable as such an array and initialize it with a copy of the string literal. (You can also do the same for the WIFI_PASS
argument, but that is not required, as the second argument to begin()
is a const char*
.):
QUESTION
While setting up ssh over tor I determined that the ssh only works from the device I try to access (deviceA
), but not from another device (deviceB
).
I get a fresh install of Ubuntu Server 20.04 LTS, verify it is connected through wifi to the internet, completed the sudo apt update and upgrade commands successfully, rebooted successfully, and ran: sudo apt install tor
. Next, I ran
ANSWER
Answered 2021-Jun-12 at 08:34The essence of the issue was the assumption that torify sets up a tor connection, which it did not by itself. Furthermore, running:
QUESTION
I have a mobile application that allows users to enable/disable WiFi on click of a button.
However I noticed today that my app is no longer able to change the WiFi status. It was working since before few weeks. I tried to debug it but the following method always returns false.
...ANSWER
Answered 2021-Jun-12 at 05:07This API is no longer supported when targeting Android 10 or higher.
Starting with Build.VERSION_CODES#Q, applications are not allowed to enable/disable Wi-Fi. Compatibility Note: For applications targeting Build.VERSION_CODES.Q or above, this API will always fail and return false. If apps are targeting an older SDK (Build.VERSION_CODES.P or below), they can continue to use this API.
Instead, you should use the Settings.Panel API to present a system UI allowing users to enable or disable Wi-Fi.
QUESTION
I'm doing a project with a Ublox NEO 6m gps and a Raspberry Pi 4 model B and I'm stuck on the following error:
...ANSWER
Answered 2021-Jun-07 at 15:17I'm assuming this is due to your code re-initializing the connection each loop. I recommend trying the following code instead --
QUESTION
I am a little bit confused about my network setup at home.
This is the setup:
VLAN1 - 172.16.20.0/24 VLAN2 - 10.11.12.0/24
I am in the VLAN2 net (which is my WiFi), for the moment I allowed all traffic between both subnets.
My setup uses a KVM host for most of the services, my firewall lies on this machine and is virtualized (opnsense).
So the KVM network interfaces looks like this:
...ANSWER
Answered 2021-Jun-11 at 17:32I fixed it by myself. The management interface itself was missing a route to the VLAN2 net. Works now :)
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