EM Microelectronic enables open-standard ESL with Bluetooth 5.4 PAwR
Connected retail is entering a new era of interoperability. As Electronic Shelf Label (ESL) deployments scale, retailers and solution providers are increasingly pushing back against proprietary ecosystems that drive vendor lock-in, inflate integration costs, and limit the ability to mix infrastructure components.
EM Microelectronic addresses this shift by integrating full support for Bluetooth 5.4 Periodic Advertising with Responses (PAwR) and the Bluetooth ESL Profile into the SDK for its em | bleu SoC (EM9305).
This move enables ESL manufacturers to build standards-based, interoperable solutions while maintaining extreme miniaturization and energy efficiency.
Open standards remove barriers for large-scale ESL rollouts
PAwR introduces a one-to-many communication model designed for high-density ESL networks. Instead of maintaining thousands of individual connections, an access point can broadcast synchronized updates while tags respond in allocated time windows.
This architecture helps reduce energy consumption on the tag side and supports scalable rollouts with predictable latency for real-time price and content updates.
The Bluetooth ESL Profile complements PAwR by defining a common framework for configuration, confirmation behavior, and security mechanisms such as encrypted advertising data. For retailers, this opens the door to deploying tags and access points from different vendors, evolving infrastructure over time, and reducing dependency on closed ecosystems.
em | bleu EM9305: built for ultra-compact, ultra-low power ESL tags
The em | bleu (EM9305) targets the physical and power constraints of next-generation ESL designs:
Ultra-miniature footprint: 1.8 × 1.8 mm to support slim industrial designs
Energy efficiency: deep sleep consumption down to 200 nA for multi-year operation concepts
Flexible supply range: 1.1 V to 3.6 V to accommodate varied battery choices or energy-harvesting designs
Memory resources: Flash and RAM sized for firmware needs and display buffering workflows
System simplification: on-chip power features designed to reduce external components and optimize overall efficiency
For battery-lean and battery-less concepts, EM Microelectronic also positions complementary power-management options to support photovoltaic or hybrid approaches, keeping ESL tag designs compact and cost-conscious.
Faster time-to-market with PAwR + ESL Profile SDK enablement
To help manufacturers move from concept to production, EM Microelectronic’s SDK includes the Bluetooth stack with native PAwR and ESL Profile support, plus reference examples and tooling aimed at reducing development effort for both tag and access-point implementations.
Beyond pricing: a platform for connected retail use cases
With open Bluetooth-based interoperability as a foundation, ESL tags can evolve into connected endpoints that support additional IoT functions, such as sensor data capture (e.g., temperature, motion, ambient light), integration into POS and analytics platforms, and new in-store workflows. EM Microelectronic positions em | bleu as a future-ready building block for this next layer of connected retail.
Availability
PAwR and Bluetooth ESL Profile support are available via the em | bleu SDK for ESL manufacturers and solution developers. Get in touch with EM Microelectronic to discuss architecture, SDK access, and implementation support.