My Sticky Helmet Notes

Complete List of SP Flash Tool Error Codes and their Meanings and Solutions MTK Chipset. . How to Fix SP Flash Tool Errors (BROM Error Codes): SP Flash Tool Failed to enumerate COM Port This error clearly means that the Flash Tool has issues finding the COM port on which your device is connected. Solution: Connect your watch to other Port and make sure you have USB Drivers installed. Open “Device Manager” and find the COM Port of the device you connected. Once found, open Flash Tool, click on Options -> COM Port -> Select the COM Port on which you have connected your device. Device automatically disconnects during flashing Meaning: Device disconnects as soon as the flashing process begins, interrupting the process. Solution: Try a different USB Cord, USB Port & PC Hold the Volume down or up button while connecting the device to PC for flashing SP Flash Tool remains at 0% Solution: Install necessary MediaTek VCOM drivers on PC. Use the latest version of S

This just a pre-diagnose overview before taking in depth action to identify the actual issue whether it comes from hardware or software issue.

OSI layer Mnemonic A ll P eople S eem T o N eed D omina P izza A pplication layer - aka layer 7 PDU Message Example: Browser ID= GUI P resentation layer - aka layer 6 PDU Message Example ClientSide Scriting ID= Content-Type S ession layer -aka layer 5 PDU Message Example: Server-Side scripting ID=  T ransport layer - aka Layer 4 PDU Datagram/Segment Example: TCP/UDP ID=Port N etwork Layer - aka Layer 3: PDU Packet Example : Router ID= IP D ata/link layer - aka Layer 2: PDU Frame. Example Switch. ID=MAC P hysical Layer - aka Layer 1 : PDU bit. Example : Hub ID=Signal

Step 1 : Perform Sampling Current case we take half of sine wave. We can also take another half of sine wave Step 2 : Square all the value Step 3: Mean/Average the Squared value Step 4 : Square Root the value from step 3 Done! You've got the RMS Value.  AC RMS equivalent to DC Fast Track -> RMS Value = 0.707 * V Max    - Mostly applicable for pure sine wave Sources :  https://www.youtube.com/watch?v=Ynv_C3N0fPk

Sources :  https://appliantology.org/gallery/image/46-temperature-resistance-voltage-chart-for-samsung-refrigerator-thermistors/