Twilio provides Machine-to-Machine (M2M) commands to send data directly from IoT devices to the internet and vice versa, allowing for occasional commands such as waking a device or sending a message when it wakes up. These commands can be sent via SMS using development boards like the Adafruit Feather FONA 32u4, which are well-suited for sending an SMS using a Programmable Wireless SIM. Twilio's M2M commands can also be used with other APIs to send texts, WhatsApp messages, and emails, make phone calls, start video chats, or trigger additional M2M commands, offering endless possibilities. To use these commands, developers need to set up a Twilio account, phone number, Programmable Wireless SIM, and device that can text a short code using the Twilio SIM, such as the Adafruit Feather FONA 32u4. The process involves setting up M2M commands in firmware, writing a Twilio Function to handle incoming M2M commands, configuring the SIM to use the Twilio Function, and testing it by sending an M2M command from the device.