Sigfox is a low-power wireless network available in 35 countries for IoT communication. It uses a simple and low-energy architecture with small message payloads of up to 12 bytes that can be sent up to 140 times per day. Hardware solutions like modules starting at $2 are available from partners to connect devices to the Sigfox network for long-range communication over distances of a few kilometers up to 100km in ideal conditions.