Jolly Module

Datasheet Jolly Module
Jolly is a new electronic module for makers and Arduino UNO
lovers. This Arduino Uno-compatible module has integrated WiFi, to infinitely extend the potential of your projects into the new
world of IoT. Thanks to the addition of the Wi-Fi interface, the functionality of the Arduino UNO can finally be extended, turning it
into an IoT device. To date, all the projects previously made for the
board are mutually compatible with this module. Board Design The Jolly module takes the place of the ATMega328P of the Arduino UNO, replaced with its
newer SMD version called ATMega328PB. This microcontroller allows us to preserve the
full compatibility of the pinout, firmware and hardware architecture of its predecessor, but in
a much smaller space. Therefore, an additional microcontroller was inserted to allow the addition of Wi-Fi functionality. The most obvious choice was to use an ESP8285, equivalent to
the ESP8266 but with integrated 2MB flash, an essential feature to keep the board size small.
Finally, since the two microcontrollers do not operate with the same power supply domain (5V
for ATMega328PB and 3.3V for ESP8285) we have also included a voltage regulation and
interfacing circuit between the two chips.
In this way, the board can be easily substituted to the ATMega328P without any kind of circuit
modification to the Arduino UNO, ensuring an automatic compatibility with all projects
made so far for the Arduino UNO.
The board is finally equipped with a BUILTIN LED and an integrated Antenna.
The two microcontrollers are connected to each other through two digital interfaces: one SPI
and one UART. In particular, the SPI interface -which is the same exposed on the pinout of the
module -is used for data exchange, while the UART, is the exclusive prerogative of programming, both for the ATMega328PB and the ESP8285.
The serial interface of the latter is active only during the programming phase so as not to interfere with the normal operation of the serial ATMega328PB. The programming of the Wi-Fi
chip is possible thanks to the presence of a boot key for the latter and a special firmware in
the ATMega328PB. …

2022/09/12 Pinout Analog pin
Power EXT-RSTB 1 28 PC5 A5 0 RX 2 27 PC4 A4 1 TX 3 26 PC3 A3 2 PD2 4 25 PC2 A2 3~ PD3 5 24 PC1 A1 4 PD4 6 23 PC0 A0 +5V 7 22 GND GND 8 21 AREF 9 20 10 19 SCK 13 * 5~ PD5 11 18 MISO 12 * 6~ PD6 12 17 MOSI 11~ * 7 PD7 13 16 PB2 10~ 8 PB0 14 15 PB1 9~ Digital pin
Ground pin * Pins 11, 12 and 13 cannot be used while Wi-Fi MCU is in use. Not connected
Special …

5 4 3 2 BOOT sequence ANT1 C6 +5V FUSE settings +5V TBD 1 FEED L1
TBD CV201210-100K NM
Z1 R23 10k ESP_GPIO2 ESP_3V3 22
23
18
19
20
21 WIFI_LED Y1
XRCGB26M000F0L00R0
C 7
32
14 4 3 27 2 1 28
C2
10p C1
10p 1 2 2 C11
10u 16 ESP_GPIO4
15 ESP_GPIO0 GPIO4
GPIO0 25
26 URXD
UTXD R6 10k
ESP_3V3 R19
R18 100
100 RXD0 …