Hi,
I think CC1110 is best solution.
The CC1110 is a low-cost true System-on-Chip (SoC) device designed for low-power and low-voltage wireless communication applications.
The CC1110 combines the excellent performance of the state-of-the-art CC1100 RF transceiver with an industry-standard enhanced 8051 MCU, 32 KB of in-system programmable flash memory, 4 KB of RAM and many other powerful features.
The CC1110 is highly suited for systems where very low power consumption is required. This is ensured by several advanced low-power operating modes.
The CC1110 provides a tight integration between the MCU core, software and the RF transceiver, making this System-on-Chip solution easy to use as well as improving performance.
CC1110 is supported by a powerful integrated development environment (IDE). In-circuit interactive debugging is supported for the industry standard IAR C-SPY IDE via a simple two-wire serial interface.
CC1110 is based on Chipcon’s SmartRF04® technology platform in 0.18 µm CMOS.