In my previous article, I made a skeleton program for a tutorial about the various ways of WiFi connection of an ESP8266, I ran into an odd problem that turned ourt to be related to the password.
the code aimed to include both STA and AP connection and I set up the credentials like this.
#define WIFI_SSID "YOURSSID" #define WIFI_PASS "YOURPASSWORD" // Set AP credentials #define AP_SSID "YOUR_DESIRED_AP_NAME" #define AP_PASS "YOUR_DESIRED_AP_PW"
After uploading the acces point ofcourse identified itself as ‘YOUR_DESIRED_AP’ and I quickly set to correct my mistake of not filling out my credentials and I changed it to:
// Set AP credentials #define AP_SSID "Pond" #define AP_PASS "1234"
After uploading again, I was surprised to see that instead of the expected AP SSID ‘Pond’, I now saw ESP-859C2F, with the numbers being the last 3 bytes of my ESP’s MAC-number. Chosing that accespoint made me connect to the ESP without asking for a password.
what the heck was going on? I knew the code was allright as on myinitial upload I had seen the SSID of the AP when it was still called “YOUR_DESIRED_AP_NAME”.
To make a long story short: I found out the problem was with the password: apparently there is a problem with a password that is too short, or contains numbers.
1234–> no proper AP_SSID visible
abcd1234 –>no proper AP SSID visible
abcd123–> works well.
So initially I thought that perhaps the amount of letters needed to be bigger than the amount of numbers in th epassword.
but ‘1234567’ worked fine….till I tried ‘123456’ which did not work, and then ‘1234567’ did not work either anymore and i had to go to ‘12345678’ to make it work.
Note: I uploaded the sketches with the “Tools-erase all flash content set”.
So I am still not entirely sure the exact problem, but I do know that numbers in the password apparently can cause problems with the AP