We're using a Digi modem to periodically transmit data using the MQTT library in micro-Python, and power draw is very important because our instruments are solar powered and remote. We're setting it up for power saving mode (DO = 0x8) with remote manager disabled, and pin sleep mode (SM = 1) to assert the sleep signal when the data transmission is complete. We're monitoring the current draw on the XBIB-CU-TH development board across jumper P10, using pin D4 as an output that is set high when the communication is initiated, low when disconnected. The current draw remains high for approximately twenty seconds after the modem is disconnected (D4 goes low), regardless of the state of the sleep pin, as if the sleep pin has no effect. We've been using a Digi Radio module, which powers down immediately, so I was expecting similar behavior. I assume there's some handshaking going on to disconnect from the cell tower, but is there any way to make that time shorter? Unfortunately I can't attach a scope screen shot of the current profile, but the time it takes to shut down at the end of the transmission is longer than the transmission itself, and nothing I've tried seems to help. Maybe we need to live with it, but it would be nice to have an explanation, thanks.