Seeed 113020007 Grove - Blueseeed (HM11)

-Seeed-113020007-Grove-Blueseeed-HM11-Seeed-Studio-113020007-Seeed-113020007-Grove-Blueseeed-HM11-is-a-cost-effective-low-power-true-system-on-chip-SoC-for-Bluetooth-low-energy-applications-It-enables-robust-BLE-master-or-slave-nodes-to-be-built-with-very-low-total-bill-of-material-costs-The-CC2540-combines-an-excellent-RF-transceiver-with-an-industry-standard-enhanced-8051-MCU-in-system-programmable-flash-memory-8-KB-RAM-and-many-other-powerful-supporting-features-and-perip

Price: 18.74 from Rapid Online Rapid Electronics Ltd.