Author: Manish

ESP-01 Flashing Errors

After a few years I started working with an ESP-01 again. But after so many years I forgot the exact parameters of module I have and was using default settings. For hours I couldn’t flash anything to it. Everytime flashing failed with one error or other. The most occurring errors are : Invalid (unsupported) command… Continue reading ESP-01 Flashing Errors

Solar panel online calculators

Free Solar Panel Calculator and Solar Power Calculator Solar Panel Output Calculator- Estimate the Real Energy You Can Get From Your Solar Panels   https://www.renogy.com/calculators#tab_solar-size   Kolkataonweb.com doesn’t have any affiliation to the above websites. Neither Kolkataonweb.com warranties or guarantees any calculations.  You may use them as a guide to calculate solar panel and battery… Continue reading Solar panel online calculators

Cross Origin or CORS Issue

We often get the CORS error when we try to run some code from localhost or XAMPP. The following steps will help to solve it. Please note you will need access to server side code or server configurations.  Set Access-Control-Allow-Origin to “*” in the code Set Header set Access-Control-Allow-Headers to “*” in the code  If… Continue reading Cross Origin or CORS Issue