📝 add some research information

research.md

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+# Random thinks
+
+eventually this is the original manufacture:  
+[Shenzhen Lesun Electronics Co., Ltd.](https://lesun-led.en.alibaba.com/)
+
+## 11x44
+### controller
+??
+
+## 12x48
+### controller
+MindMotion MM32L052PF  
+ARM Cortex-M0 48MHz  
+32KB Flash, 4KB RAM, 39 IO, LQFP48  
+[MM32L0 Datasheet](http://www.mindmotion.com.cn/en/download.aspx?cid=2564)  
+
+---
+
+## bluetooth
+[Play-Store: Bluetooth LED Name Badge](https://play.google.com/store/apps/details?id=com.yannis.ledcard)
+
+- [F1248](https://www.alibaba.com/product-detail/Flexible-Programmable-Scrolling-Bluetooth-LED-Message_62159467977.html)
+- [B1144](https://www.alibaba.com/product-detail/Bluetooth-LED-Signs-LED-Name-Badge_60676183421.html)
+- [B1155](https://lesun-led.en.alibaba.com/product/62126138771-805144131/Flashing_Employee_Rechargeable_USB_Led_Magnetic_Bluetooth_Name_Tag.html) [amazon](https://www.amazon.com/Jahuite-Rechargable-Cellphone-Programmable-Bluetooth/dp/B07RRV1X7X/)