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Hi, I am using Energia ethernet library for Ti Tiva c 129 Launchpad. I wrote a simple program in Energia that gets a byte from stream and sends back two bytes. It seems there is lag when I send bytes back from Ti board. Here is my code. byte mac[] = {0x00, 0x0A, 0xB7, 0x52, 0xBA, 0x16 }; IPAddress ip(192,168,1,192); IPAddress gateway(192,168,1,1); IPAddress subnet(255,255,255,0); EthernetServer server(80); EthernetClient client; void setup() { Ethernet.begin(mac, ip, gateway, subnet); server.begin(); Serial.begin(9600); } void loop() { byte buf[2]; buf[0] = 'O'; buf[1] = 'K'; client = server.available(); if (client.available()) { char c = client.read(); if (c == 'S'){ Serial.print("A"); client.write(buf, 2); } } } And i am sending data from a simple vb program like this Dim d As Byte() data = New [Byte](2) {} d = System.Text.Encoding.ASCII.GetBytes("S") stream.Write(d, 0, d.Length) While stream.DataAvailable = False End While stream.Read(data, 0, data.Length) d = System.Text.Encoding.ASCII.GetBytes("S") stream.Write(d, 0, d.Length) While stream.DataAvailable = False End While stream.Read(data, 0, data.Length) d = System.Text.Encoding.ASCII.GetBytes("S") stream.Write(d, 0, d.Length) While stream.DataAvailable = False End While stream.Read(data, 0, data.Length) MessageBox.Show("Test") It takes more than half a second for "Test" message to appear on the screen using Ti Tiva C129 board and Energia. If we send data byte by byte like this: client.write('O'); client.write('K'); It works fine. I tried the same program with Arduino Mega and it works fine regardless of how we send it. When using Arduino Mega it takes less than maybe 50 milliseconds for message to appear on the screen
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I got an email about this today - you can order up to 2 Tiva Connected LPs at $19.99 each. Very tempting! https://estore.ti.com/tiva-connected-launchpad.aspx?DCMP=mcu-tivc-ek-tm4c129xl-en&HQS=mcu-tivc-ek-tm4c129xl-em-es-en
