I'm building an affordable portable phone charger that looks almost similar to the typical small Iphone charger with modular USB plug.
My power source comes from a 12V regulated solar PV system.
I need hardware recommendation for a 1A 12V to adjustable 5~5.5V (or more) switching regulator IC...
The Modbus of the energy meter is not responding as expected even thought the terminal resistor was connected. This is a new problem. I was using ModScan32 as a master device previously. For this post, i'm using an mbed microcontroller as a master device.
I'm using an mbed micro-controller to retrieve register from Integra 1630 energy meter with modbus via a SIPEX SP485CS chip (RS485 level shiftier).
All the component and connection are working correctly.(Double checked) Using the same program with different reigster, i'm able to get good modbus...
@itsmoked
Less than 50m(Estimated), didn't really went to measured it. 9600 baud rate.
I did some experiment with the length of the wire without a terminal resistor.
If length of wire is less than 1m = very smooth reading.
If length of wire is 1m or more = occasionally 0x00, it got worst with...
I just figured out the problem today. There was no terminal resistor between the twisted pair. That is the reason why i keep getting 0x00. After adding a 120ohms to it, the signal was very smooth.
I'm using Modscan to check the data from my Integra 1630 Energy meter.
Often, i will only receive a register value of 0x00 while occasionally a
good reply. I tried changing the scan rate from 100ms to 5s but nothing
changes. The wire connected from my RS485 to the energy meter is less
than...
