Most of the important components live on the battery pin board, we spy:

STM32100C8 micro controller with an ARM Cortex-M3 32-bit RISC core

MCP2003 LIN J2602 Transceiver

Diodes Inc AS358M low-power dual operational amplifiers

GH17M transistor

The rest of the goop-covered boards mostly carry capacitors and other passive components.