📻 What is ISM?

ISM stands for Industrial, Scientific and Medical– unlicensed frequency bands (like 433 MHz, 868 MHz, 2.4 GHz)available worldwide.

Used by technologies like:

• LoRa
• Zigbee
• Bluetooth
• Proprietary  protocols

Benefits:

• Free to use
• Cost-effective
• Great  for wireless communication without SIM cards

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