Voltage and Current Measurement Expert. https://uimeter.com The Raspberry Pi Foundation had just released their latest Raspberry Pi 4 Model B, Which was completely upgraded, re-engineered, faster, and more powerful. Here are the technical specifications of Raspberry Pi 4 Model B: Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz 1GB, 2GB or 4GB LPDDR4-2400... Mon, 24 Jun 2019 06:26:52 -0700 https://uimeter.com/2019-06-24-PI035-and-PI0049-have-been-Released/ https://uimeter.com/2019-06-24-PI035-and-PI0049-have-been-Released/ UIMeterDual is the dual channel version of UIMeter, it inherits the powerful voltage and current monitor and logger functions. The test channel was extended to two. The frontend analog scheme is TI’s INA226. Main highlights are: Wide measurement range: voltage as high as 36V, current as high as +-10A，two channels.... Wed, 19 Jun 2019 17:26:52 -0700 https://uimeter.com/2019-06-19-UIMeterDual-has-been-Released/ https://uimeter.com/2019-06-19-UIMeterDual-has-been-Released/ Recently I got a new Hiwifi HC5761 router. When I tried to update to the latest firmware, I found it’s original firmware download link has broken. So I collected those firmwares and gave them a new download link, hope to be useful to you. Download link: Link: https://pan.baidu.com/s/1TAKpXb4yb1OVI5OsUqEUGQ pass:v7hv md5sum:... Mon, 15 Apr 2019 16:52:52 -0700 https://uimeter.com/2019-04-15-Hiwifi-Router-Original-Firmware-Download-Link/ https://uimeter.com/2019-04-15-Hiwifi-Router-Original-Firmware-Download-Link/ Total: 16MB = 192 + 64 + 64 + 15808 + 128 + 64 + 64 = 16384kB Firmware Start Address: 0x050000 layer0 layer1 layer2 ----------------------------------------------------------------------- mtd0:u-boot 3*64kB=192kB 0x000000-0x030000 ----------------------------------------------------------------------- mtd1:hw_panic 1*64kB = 64kB 0x030000-0x040000 ----------------------------------------------------------------------- mtd2:Factory 1*64kB = 64kB 0x040000-0x050000 ----------------------------------------------------------------------- mtd7:kernel 18*64kB = 1152kB mtd6:firmware 0x050000-0x170000 247*64kB =... Sun, 14 Apr 2019 18:42:52 -0700 https://uimeter.com/2019-04-14-Hiwifi-HC5761-Flash-Layout/ https://uimeter.com/2019-04-14-Hiwifi-HC5761-Flash-Layout/ System information echo@amlogic:~$ uname -a Linux amlogic 3.14.29 #207 SMP PREEMPT Fri Jun 1 09:27:52 MSK 2018 aarch64 aa 64 aarch64 GNU/Linux Memory information echo@amlogic:~$ free -h total used free shared buff/cache available Mem: 1.8G 87M 1.4G 17M 256M 1.6G Swap: 899M 0B 899M Storage information echo@amlogic:~$ df -h Filesystem... Thu, 14 Mar 2019 06:00:52 -0700 https://uimeter.com/2019-03-14-Phicomm_N1_P230_S905D_Review/ https://uimeter.com/2019-03-14-Phicomm_N1_P230_S905D_Review/ Total: 128MB = 1024 * 128kB = 0.5 + 0.5 + 0.25 + 32 + 0.5 + 0.5 + 0.5 + 16 + 32 + 2 + 43.25 layer0 layer1 --------------------------------------------------- u-boot 4*128kB = 0.5MB 0x00000000-0x00080000 --------------------------------------------------- debug 4*128kB = 0.5MB 0x00080000-0x00100000 --------------------------------------------------- Factory 2*128kB = 0.25MB 0x00100000-0x00140000 --------------------------------------------------- kernel... Fri, 11 May 2018 18:42:52 -0700 https://uimeter.com/2018-05-11-Hiwifi-3Pro-C312B-Flash-Layout/ https://uimeter.com/2018-05-11-Hiwifi-3Pro-C312B-Flash-Layout/ The Android version of MIUI 9.5.12.0 on Redmi Note5 is 8.1 Oreo. If you want to use Google service and Apps on Chinese ROM, you need these Apps. MIUI 9.5.12.0 on Redmi Note5 is based on the latest Android. You can’t find those Apps on most chinese App markets. file... Wed, 18 Apr 2018 18:42:52 -0700 https://uimeter.com/2018-04-18-Google-Apps-for-Redmi-Note5-on-Android8.1-Oreo/ https://uimeter.com/2018-04-18-Google-Apps-for-Redmi-Note5-on-Android8.1-Oreo/ Over the past years, I have make use of FatFS to manage files on SPI flash. This is not a good solution, because of FatFS’s lack of wear leveling ability. In the GIF below we can see how fast FatFS get failed without wear leveling. In addition, unexpected power failure... Thu, 12 Apr 2018 05:42:52 -0700 https://uimeter.com/2018-04-12-Try-LittleFS-on-STM32-and-SPI-Flash/ https://uimeter.com/2018-04-12-Try-LittleFS-on-STM32-and-SPI-Flash/ iPhone 4s/5/5c Rear:IMX145 F2.41.4um 1/3.2 8MP 5s/6/6p Rear:IMX145* F2.2 1.5um 1/3.0 8MP 6s/6sp/se Rear: F2.2 1.22um 12MP Xiaomi & Redmi Xiaomi 6/note3/max2/mix2: imx386 F2.0 1.25um 1/2.8 12MP Xiaomi 5: IMX298 1/2.8 1.12um 16MP Xiaomi 5S/GooglePixel IMX378 12MP 1/2.3 1.55um Xiaomi MIX: Front ov16880 16M 1/3.06 1.0um Rear: ov5675 1.12um Xiaomi... Thu, 29 Mar 2018 19:16:52 -0700 https://uimeter.com/2018-03-29-summary-of-mobile-phone-image-sensor/ https://uimeter.com/2018-03-29-summary-of-mobile-phone-image-sensor/ Wellcome to ECHO Studio. This site is planned to write in English. However, English is my second language, for most of the time, I write in Chinese. Don’t be confused if you find lots of Chinese characters here:( Thu, 29 Mar 2018 02:16:52 -0700 https://uimeter.com/2018-03-29-welcome-to-echo-studio/ https://uimeter.com/2018-03-29-welcome-to-echo-studio/