Model:RS232 HI POWER

2012/03/02
Question 1: 
I have reconnected the cable to work as a Null modem cable and adjusted the brate to 19200 and now there is communication, I have a bar on my software that shows the download stage, it starts to download and after the transfer reaches 7012 byte it stops, while it should continue to almost 16000 bytes?
WENSHING Answer:
While you setting transmission rate, please must collocate interface rate to set. Usually, RF transmission rate must be over interface to avoid data error. Please check below table and we suggest to set 8104 or 8105 to tryagain.
2012/03/02
Question 2: 
I want to purchase WS232HPA1B41 from your Company but i don`t find in datasheet about this good transceiver that it is real full duplex or no .
WENSHING Answer:
For our Wireless RS232 HI POWER, it is half-duplex.
2012/03/02
Question 3: 
RS232 HI POWER could work as a regular rs232 connection (male DB9) on one side and a USB connection on the PC side,is it possible directly without adding any interface?
WENSHING Answer:
Please use USB to transfer RS232 interface, it is easy to buy from market.
2012/03/02
Question 4: 
How reliable is your device?
WENSHING Answer:
We already did process for RF communication , include CRC code. So there is no question on communication.
2012/03/02
Question 5: 
Could RS232 Hi Power provide a long distance coverage?
WENSHING Answer:
It抯 ok, but you still need to check with your regulation to see which channels are available so that you can avoid the conflict with channels which mobile using. Just for your reference, FCC regulation allows 902~902MHz.
2012/03/02
Question 6: 
The COMDEMO is now working fine and the two RS232 units can be programmed in accordance to the table, We have done exactly as the document you sent, and No communication or data transmitted or received yet, however below is the remarks made by us for your reference, 1- One unit after leaving the setting mode by entering 00 will show on the Rx data window 00FF while the second unit when leaving the setting mode does not show anything. 2- When programming Command 0x83 which is is the ID for each unit, we programmed one unit to 8300hex and the second unit to 83FFhex and just as soon there is a com request from our operating software, the unit that is connected to the PC will have a red led blinking that is there is TX but from the other unit that is connected to the machine there is no response at all. 3- Now when programming Command 8C00FF at the first unit and 8CFF00 at the second unit, both leds of the two RS232 units blinks but with no data. So since we can program them now please provide the proper command code setting for both units to work as a regular WIRELESS RS232.
WENSHING Answer:
Setting on step 3 is wrong. Please check correct setting way as below: For first RS232 HI POWER, please set 8300hex, second RS232 HI POWER set 83FFhex, FF is ID. First RS232 HI POWER set 8CFFhex, FF is fixed send to the device which ID number is FF; second RS232 HI POWER set 8C00hex, 00 is fixed send to the device which ID number is 00.
2012/03/02
Question 7: 
I have done exactly as you said, and the two leds at both RS232 units are blinking when there is a com request from our software but still no data is transfered.
WENSHING Answer:
Please open ComDemo program on both two computers to check if they can communication. Please don抰 use your own software for testing first.
2012/03/02
Question 8: 
Data sheet mentioned on your website that their band is 902MHz~928MHz, but what we need is 868MHz. Can this device to that?
WENSHING Answer:
We can do in case of 868MHz, but this needs to open a new proejct.
2012/03/02
Question 9: 
1- Yes the device can connect to the pc directly and it works fine, I have a USB to RS232 cable converter that is connected on the USB side to the Computer and on the RS232 side to the device, and yes I tried replacing TX, and Rx 2- Every data is less than 120 Bytes for sure. 3- Parity bit is None.
WENSHING Answer:
Your original connection way: Computer(USB interface)<->USB to RS232 cable Converter <->Deivce Your connection way now: Computer(USB interface) <->USB to RS232 cable Converter <-> RS-232 Hi Power The question on your connection way now: RS-232 Hi Power <-> Null Modem Converter <->Device Please correct connection way according to ?Your connection way now?and try again.
2012/03/02
Question 10: 
We meet problem with distance coverage,only around 100m could be covered in an urban area, we`ve tried all positions, but no luck with longer distances, from the data sheet, it says that a distance of 20-50km could be reached in a line of site, we`ve tried that too but still same result.
WENSHING Answer:
1. Please try to use PC test the distance in the area without hindrance. 2. Please adjust power to 8410, transmission rate = 8107 and test the distance again. 3. Please make sure if you already connect all antenna before operate RS232 HI POWER.
2012/03/02
Question 11: 
When we first programmed the units we`ve set The transmission rate to 128000 that is 8107 hex is it too much?
WENSHING Answer:
8107 hex is not too much. Please check data rate stay on 7012 bytes when you sent data every time. Or you can extend the period between every data sending.
2012/03/02
Question 12: 
We have managed to work the RS232 HIPOWER on another machine with a different software, and after several trials its working fine. But the only problem is the distance coverage, its not exceeding 100meters, even though it was set to maximum of 2W. Our Setting for 2W power is 8414 and the transmission rate is 8507, baud rate is 8503 (9600) and we used your adapter for both units Product was used between two buildings one at each top in the elevator machine room.
WENSHING Answer:
It should be EMI which was causing by the testing in the elevator machine room, please use computer to test the distance first. Please don抰 test distance in the elevator machine room. Once you test the distance is more far in other place, but distance is less than 100m, you will needs use extend antenna to let the distance to be more far.
2012/03/02
Question 13: 
For both RS232 HiPower / TRW-400D we are planning to switch the units on only intermittently to save power, will that be OK? (we understand we will need to reinitialize the units after power up)
WENSHING Answer:
Yes, it can meet your requirments.
2012/03/02
Question 14: 
What is the power up time for both units? (i.e., how long do we need to wait after we power up until we can start sending the first commands?)
WENSHING Answer:
RS232 Hi Power is available 4 seconds.
2012/03/02
Question 15: 
Can we use the LM2576 to power them? Or do you recommend another power regulator? (In the FAQs there is mention of a `fast regulator`?)
WENSHING Answer:
RS232 Hi Power is available.
2012/03/02
Question 16: 
What is the level of surge protection for the RS232 HiPower and TRW-400D? As they will be used on mountain slopes it is likely that at some point they will have to deal with lightning strikes in the area during their service life. Can we add Gas Discharge Tubes / Varistors etc to the antenna circuit ourselves to enhance surge protection? Do you have a recommended configuration for that?
WENSHING Answer:
RS-232 Pins ESD Protection to IEC1000-4-2 (801.2) 8 kV: Contact Discharge 15 kV: Air-Gap Discharge Power Pins ESD Protection to JESD22-A114-B.
2012/03/02
Question 17: 
When using with another computer as you suggested, its working and any thing you write and send is received over the second computer, but why there is no connection between the PC and the machine? Our com port is Regular RS232 , with 8 bits and one stop, I have on the other side a female DB9, So we used a DB9 male to male in order to connect the unit.And the data should always be streaming from and to.
WENSHING Answer:
1. Did PC connect with your device? If yes, there should be a Null modem converter on your device, did you change TX and RX? It will not communication if you didn抰 change TX and RX. 2. Is your every data over 120 Bytes? 3. Parity Bit of COM Port is None or not?

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