Circuit Cellar 377 December 2021

• 6: Sports Wearable Uses ANT+ Protocol: The tempANT+ Project, By Carlo Tauraso
• 15: Build a Robotic Arm with Linear Actuators: Threaded-Rod Approach, By Alexandru Dumitrache
• 22: A Review: Nora Flight Controller and XunWing X4 Quadcopter: Drone Deep Dive, By Raul Alvarez-Torrico
• 32: Build an Autonomous Mapping Rover: The NanoBot Project, By Dhairya Parikh
• 42: MCU Vendors Lock In New Security Solutions: Device Defense In-Depth, By Jeff Child
• 49: Test and Measurement Tools Push Performance Barriers: Speedy Solutions, By Jeff Child
• 54: DATASHEET: Tiny Embedded Boards: Petite but Powerful, By Jeff Child
• 58: EMBEDDED IN THIN SLICES: FreeRTOS (Part 7): FreeRTOS, TCP and the Internet, By Bob Japenga
• 63: THE DARKER SIDE: Playing with I-V Curves: Plot-Powered Insights, By Robert Lacoste
• 68: FROM THE BENCH: Refrigerator Repair Project: Using Espressif’s ESP32 MCU, By Jeff Bachiochi
• 75: Product News
• 78: Test Your EQ
• 79: The Future of Full Lifecycle Security: DevSecOps and Full Lifecycle Security, By Arlen Baker

Circuit Cellar is a monthly magazine (available in print and digital) covering the topics of embedded hardware, embedded software, electrical engineering, and computer applications. More information available at circuitcellar.com