android app for changing gas station totem pole gas prices

I need an app for changing the prices for the gas station pole totem with led digit display I am using a HWA CRC protocol for encapsulate the data like : byte[0] = HVA byte[1] = HVA^0xFF byte[2] = HVA^0xFF+1 byte[3] = StreamLenght byte[4] = SourceAddress byte[5] = FunctionCode byte[6] = Data[0] first price digit 1 byte[7] = Data[1] first price digit 2 byte[8] = Data[2] first price digit 3 byte[9] = Data[3] byte[10] = Data[4] byte[11] = Data[5] byte[12] = Data[6] byte[13] = Data[7] byte[14] = Data[8] byte[15] = Data[9] byte[16] = Data[10] byte[17] = Data[11] byte[18] = Data[12] byte[19] = Data[13] byte[20] = Data[14] byte[21] = Data[15] byte[22] = Data[16] byte[23] = Data[17] byte[24] = Data[18] byte[25] = Data[19] byte[26] = Data[20] byte[27] = CRC byte[28] = CRC^0xFF byte[29] = CRC^0xFF+1 StreamLenght = 30 the app's interface has to be abble to input prices: let's say that the first price is 3.26 in this case : data[0] = 3 first price digit 1 data[1] = 2 first price digit 2 data[2] = 3 first price digit 3 and so on it will be 6 pairs of number data[i], data[i+1], data[i+2] wich will be gas prices. the last 3 bytes (Data[18], Data[19], Data[20]) will be for : Data[18] : Intensity by night; it is a byte from 0 to 255 and 0 to 100% is displayed Data[19] : Winter/Summer; can be 1 or 0 Data[20] : rezerved The gas station totem pole has an acces point with SSID and PASS and there is a SERVER started. The android device will be CLIENT the user has to connect the device to that SSID, lunch the app, change the prices and send it to the totem pole. I have attached a picture with the app witch work under windows