Invalid argument type when sending a write request in Pythonhttps://devzone.nordicsemi.com/f/nordic-q-a/100496/invalid-argument-type-when-sending-a-write-request-in-pythonHi, I have a service that receives an uint8_t and it looks as shown below in the nRF Connect app I try to configure it via the PC-BLE framework by using an nRF52840 dongle, but I get the error &quot; Invalid argument type&quot; every time when I want to scheduleen-USTelligent Community 13Tue, 06 Jun 2023 13:56:57 GMTRE: Invalid argument type when sending a write request in Pythonhttps://devzone.nordicsemi.com/thread/429592?ContentTypeID=1Tue, 06 Jun 2023 13:56:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:05fcb2cd-2500-4975-b663-48ba5e2def43Einar Thorsrud<p>Hi,</p> <p>The &quot;Invalid argument type&quot; issue comes from:</p> <p><pre class="ui-code" data-mode="python">self.adapter.write_req(self.conn, self.service, struct.pack(&#39;b&#39;, 20))</pre></p> <p>I don&#39;t see where self.service comes from, though. Are parts of the script missing? The second parameter you pass to write_req() should be the UUID of the characteristic you are writing to.</p> <p>PS: You can copy-paste code in a readable way from Insert -&gt; Insert Code.</p><div style="clear:both;"></div>