Changes

Switch to the <b>Port</b> tab and chose the settings, then click on <b>Open</b>. You should see the communication of the device flowing over the UART. Now switch to the <b>Send</b> tab and put in <b>!W\r\n</b> into the first send line. Click <b>Send ASCII</b> to send the programming command to the device. The communication flow should stop and the LED should stop blinking. Do not power cycle the device now until the flash process was finished.  <b>Important:</b> Switch back to the <b>Port</b> tab and release the <b>Open</b> button to be able to connect with the flash tool.  <b>Trouble shooting:</b> If an error message appears in Realterm just click it away and try a few more times to click the button until it was released without an error message.