diff --git a/rtic_ws2812_pio/src/main.rs b/rtic_ws2812_pio/src/main.rs
index fdd553e..546b382 100644
--- a/rtic_ws2812_pio/src/main.rs
+++ b/rtic_ws2812_pio/src/main.rs
@@ -246,6 +246,7 @@ mod app {
     )]
     fn timer_irq(mut c: timer_irq::Context) {
         let clr : RGB8 = (255, 0, 255).into();
+        info!("Sched!");
 
         c.shared.ws.lock(|ws|
             ws.write([clr].iter().copied()).unwrap());
diff --git a/ws2812_bl_ctrl/Cargo.toml b/ws2812_bl_ctrl/Cargo.toml
new file mode 100644
index 0000000..7d671f3
--- /dev/null
+++ b/ws2812_bl_ctrl/Cargo.toml
@@ -0,0 +1,93 @@
+[package]
+authors = ["Weird Constructor"]
+edition = "2018"
+readme = "README.md"
+name = "rp2040-ws2812-led-cube"
+version = "0.1.0"
+resolver = "2"
+
+[dependencies]
+cortex-m = "0.7.3"
+cortex-m-rt = "0.7.0"
+embedded-hal = { version = "0.2.5", features=["unproven"] }
+embedded-time = "0.12.0"
+
+defmt = "0.2.0"
+defmt-rtt = "0.2.0"
+panic-probe = { version = "0.2.0", features = ["print-defmt"] }
+
+#rp2040-hal = { git = "https://github.com/rp-rs/rp-hal", branch="main", features=["rt"] }
+rp2040-boot2 = { git = "https://github.com/rp-rs/rp2040-boot2-rs", branch="main" }
+rp-pico = { git = "https://github.com/rp-rs/rp-hal.git", branch="main" }
+
+smart-leds = "0.3.0"
+ws2812-pio = { path = "ws2812-pio-rs" }
+
+nb = "1.0"
+
+[features]
+default = [
+    "defmt-default",
+]
+defmt-default = []
+defmt-trace = []
+defmt-debug = []
+defmt-info = []
+defmt-warn = []
+defmt-error = []
+
+# cargo build/run
+[profile.dev]
+codegen-units = 1
+debug = 2
+debug-assertions = true
+incremental = false
+opt-level = 3
+overflow-checks = true
+
+# cargo build/run --release
+[profile.release]
+codegen-units = 1
+debug = 2
+debug-assertions = false
+incremental = false
+lto = 'fat'
+opt-level = 3
+overflow-checks = false
+
+# do not optimize proc-macro crates = faster builds from scratch
+[profile.dev.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
+
+[profile.release.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
+
+# cargo test
+[profile.test]
+codegen-units = 1
+debug = 2
+debug-assertions = true
+incremental = false
+opt-level = 3
+overflow-checks = true
+
+# cargo test --release
+[profile.bench]
+codegen-units = 1
+debug = 2
+debug-assertions = false
+incremental = false
+lto = 'fat'
+opt-level = 3
+
+[dependencies.num-traits]
+version = "0.2.14"
+default-features = false
diff --git a/ws2812_bl_ctrl/build.rs b/ws2812_bl_ctrl/build.rs
new file mode 100644
index 0000000..d534cc3
--- /dev/null
+++ b/ws2812_bl_ctrl/build.rs
@@ -0,0 +1,31 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    // By default, Cargo will re-run a build script whenever
+    // any file in the project changes. By specifying `memory.x`
+    // here, we ensure the build script is only re-run when
+    // `memory.x` is changed.
+    println!("cargo:rerun-if-changed=memory.x");
+}
diff --git a/ws2812_bl_ctrl/memory.x b/ws2812_bl_ctrl/memory.x
new file mode 100644
index 0000000..0596611
--- /dev/null
+++ b/ws2812_bl_ctrl/memory.x
@@ -0,0 +1,13 @@
+MEMORY {
+    BOOT2 : ORIGIN = 0x10000000, LENGTH = 0x100
+    FLASH : ORIGIN = 0x10000100, LENGTH = 2048K - 0x100
+    RAM   : ORIGIN = 0x20000000, LENGTH = 256K
+}
+
+SECTIONS {
+    /* ### Boot loader */
+    .boot2 ORIGIN(BOOT2) :
+    {
+        KEEP(*(.boot2));
+    } > BOOT2
+} INSERT BEFORE .text;
\ No newline at end of file
diff --git a/ws2812_bl_ctrl/res/breadboard_setup_hc_05.jpg b/ws2812_bl_ctrl/res/breadboard_setup_hc_05.jpg
new file mode 100755
index 0000000..3e30961
Binary files /dev/null and b/ws2812_bl_ctrl/res/breadboard_setup_hc_05.jpg differ
diff --git a/ws2812_bl_ctrl/src/main.rs b/ws2812_bl_ctrl/src/main.rs
new file mode 100644
index 0000000..0ae3e75
--- /dev/null
+++ b/ws2812_bl_ctrl/src/main.rs
@@ -0,0 +1,258 @@
+#![no_std]
+#![no_main]
+
+use cortex_m_rt::entry;
+use defmt::*;
+use defmt_rtt as _;
+use embedded_time::duration::*;
+use embedded_hal::timer::CountDown;
+use panic_probe as _;
+
+use embedded_hal::adc::OneShot;
+use rp_pico::hal::{
+    pac,
+    clocks::{Clock, init_clocks_and_plls},
+    sio::Sio,
+    adc::Adc,
+    watchdog::Watchdog,
+    timer::Timer,
+};
+
+use rp_pico::hal::pio::PIOExt;
+//use rp2040_hal::pio::PIOExt;
+use smart_leds::{brightness, SmartLedsWrite, RGB8};
+use ws2812_pio::Ws2812;
+
+#[link_section = ".boot2"]
+#[used]
+pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER_W25Q080;
+
+const LEN : usize = 100;
+
+struct MovingAvg {
+    buf:    [u16; 30],
+    ptr:    u16,
+}
+
+impl MovingAvg {
+    pub fn new() -> Self {
+        Self {
+            buf: [0xFFFF; 30],
+            ptr: 0,
+        }
+    }
+
+    pub fn next(&mut self, input: u16) -> u16 {
+        self.buf[self.ptr as usize] = input;
+        self.ptr = ((self.ptr as usize + 1) % self.buf.len()) as u16;
+        let mut sum : usize = 0;
+        for b in &self.buf {
+            sum += *b as usize;
+        }
+        (sum / self.buf.len()) as u16
+    }
+}
+
+pub fn hsv2rgb(hue: f32, sat: f32, val: f32) -> (f32, f32, f32) {
+    let c = val * sat;
+    let v = (hue / 60.0) % 2.0 - 1.0;
+    let v = if v < 0.0 { -v } else { v };
+    let x = c * (1.0 - v);
+    let m = val - c;
+    let (r_, g_, b_) =
+        if        hue >= 0.0   && hue < 60.0 {
+            (c, x, 0.0)
+        } else if hue >= 60.0  && hue < 120.0 {
+            (x, c, 0.0)
+        } else if hue >= 120.0 && hue < 180.0 {
+            (0.0, c, x)
+        } else if hue >= 180.0 && hue < 240.0 {
+            (0.0, x, c)
+        } else if hue >= 240.0 && hue < 300.0 {
+            (x, 0.0, c)
+        } else { // if hue >= 300.0 && hue < 360.0 {
+            (c, 0.0, x)
+        };
+//    println!("in: h={}, s={}, v={}, r:{}, g:{}, b: {}", hue, sat, val,
+//        (r_ + m) * 255.0,
+//        (g_ + m) * 255.0,
+//        (b_ + m) * 255.0);
+    (r_ + m, g_ + m, b_ + m)
+}
+
+pub fn hsv2rgb_u8(h: f32, s: f32, v: f32) -> (u8, u8, u8) {
+    let r = hsv2rgb(h, s, v);
+    (
+        (r.0 * 255.0) as u8,
+        (r.1 * 255.0) as u8,
+        (r.2 * 255.0) as u8
+    )
+}
+
+#[entry]
+fn main() -> ! {
+    info!("Program start");
+    let mut pac      = pac::Peripherals::take().unwrap();
+    let _core         = pac::CorePeripherals::take().unwrap();
+    let mut watchdog = Watchdog::new(pac.WATCHDOG);
+    let sio          = Sio::new(pac.SIO);
+
+    // External high-speed crystal on the pico board is 12Mhz
+    let external_xtal_freq_hz = 12_000_000u32;
+    let clocks =
+        init_clocks_and_plls(
+            external_xtal_freq_hz,
+            pac.XOSC,
+            pac.CLOCKS,
+            pac.PLL_SYS,
+            pac.PLL_USB,
+            &mut pac.RESETS,
+            &mut watchdog)
+        .ok()
+        .unwrap();
+
+    let pins = rp_pico::Pins::new(
+        pac.IO_BANK0,
+        pac.PADS_BANK0,
+        sio.gpio_bank0,
+        &mut pac.RESETS,
+    );
+
+    let timer = Timer::new(pac.TIMER, &mut pac.RESETS);
+    let mut delay = timer.count_down();
+
+    let (mut pio, sm0, _, _, _) = pac.PIO0.split(&mut pac.RESETS);
+    let mut ws = Ws2812::new(
+        pins.gpio18.into_mode(),
+        &mut pio,
+        sm0,
+        clocks.peripheral_clock.freq(),
+        timer.count_down(),
+    );
+
+    let uart_pins = (
+        // UART TX (characters sent from RP2040) on pin 1 (GPIO0)
+        pins.gpio16.into_mode::<rp_pico::hal::gpio::FunctionUart>(),
+        // UART RX (characters received by RP2040) on pin 2 (GPIO1)
+        pins.gpio17.into_mode::<rp_pico::hal::gpio::FunctionUart>(),
+    );
+
+    let mut uart = rp_pico::hal::uart::UartPeripheral::new(pac.UART0, uart_pins, &mut pac.RESETS)
+        .enable(
+            rp_pico::hal::uart::common_configs::_9600_8_N_1,
+            clocks.peripheral_clock.into(),
+        )
+        .unwrap();
+
+//    let mut adc = Adc::new(pac.ADC, &mut pac.RESETS);
+//    let mut adc_pin_0 = pins.gpio26.into_floating_input();
+//
+//
+//    let mut n: u8 = 0;
+//    let mut leds_off : [RGB8; LEN] = [(0,0,0).into(); LEN];
+//
+//    for i in 0..LEN {
+//        leds[i] = (255, 128, 64).into();
+//    }
+////    leds[149] = (255, 255, 255).into();
+////    leds[70] = (255, 0, 255).into();
+////    leds[100] = (255, 0, 0).into();
+//
+//    let colors : [RGB8; 3] = [
+//        hsv2rgb_u8(0.0, 1.0, 1.0).into(),
+//        (0, 255, 0).into(),
+//        (0, 0, 255).into(),
+//    ];
+//
+//    let amperes = 8.0;
+//    let all_on_amp = (LEN as f32 * 3.0 * 60.0) / 1000.0;
+//
+//    let vbrightness = ((amperes / all_on_amp) * 255.0) as u8;
+//    info!("brightness={} / 255", vbrightness);
+//    ws.write(brightness(leds_off.iter().copied(), vbrightness)).unwrap();
+//
+////    for i in 0..LEN {
+////        leds[i] = colors[1];
+////    }
+////    info!("LEDS={}", leds.len());
+//
+//    let mut cnt = 0;
+//
+//    let mut j = 0;
+//
+//    loop {
+//        cnt += 1;
+//        if cnt > 400 {
+//            cnt = 0;
+//        }
+//
+//        let clr = hsv2rgb_u8((cnt as f32 / 400.0) * 360.0, 0.0, 1.0);
+////        info!("[{}] clr : {}", cnt, clr);
+//        for i in 0..LEN {
+//            leds[i] = clr.into();
+//        }
+//
+//    }
+
+    let max_ma = 500.0f32;
+    let mut leds : [RGB8; LEN] = [(0,0,0).into(); LEN];
+
+    let real_len = 9;
+    loop {
+        if uart.uart_is_readable() {
+            let mut buf = [0u8; 100];
+            if let Ok(len) = uart.read_raw(&mut buf) {
+                let s = core::str::from_utf8(&buf[0..len]).unwrap();
+                info!("Recv: [{}]", s);
+            }
+
+            if buf[0] == b'r' {
+                for l in leds.iter_mut() {
+                    *l = hsv2rgb_u8(0.0, 1.0, 1.0).into();
+                }
+            } else if buf[0] == b'y' {
+                for l in leds.iter_mut() {
+                    *l = hsv2rgb_u8(60.0, 1.0, 1.0).into();
+                }
+            } else if buf[0] == b'w' {
+                for l in leds.iter_mut() {
+                    *l = hsv2rgb_u8(0.0, 0.0, 1.0).into();
+                }
+            } else {
+                for l in leds.iter_mut() {
+                    *l = hsv2rgb_u8(90.0, 1.0, 1.0).into();
+                }
+            }
+
+            let vbrightness = limit_to_milliamp(&leds[0..real_len], max_ma);
+            info!("Bright={}", vbrightness);
+
+            ws.write(brightness(leds.iter().copied(), vbrightness)).unwrap();
+        }
+        delay.start(16.milliseconds());
+        let _ = nb::block!(delay.wait());
+    }
+}
+
+/// Returns the brightness from 0 to 255.
+pub fn limit_to_milliamp(leds: &[RGB8], max_milliamp: f32) -> u8 {
+    let mut sum_ma : f32 = 0.0;
+
+    for l in leds.iter() {
+        sum_ma += (l.r as f32 / 255.0) * 60.0;
+        sum_ma += (l.g as f32 / 255.0) * 60.0;
+        sum_ma += (l.b as f32 / 255.0) * 60.0;
+    }
+
+    let factor = max_milliamp / sum_ma;
+    if factor > 1.0 { 255u8 }
+    else            { (255.0 * factor) as u8 }
+}
+
+//pub fn rot(slice: &mut [RGB8]) {
+//    let first = slice[0];
+//    for i in 1..slice.len() {
+//        slice[i - 1] = slice[i];
+//    }
+//    slice[slice.len() - 1] = first;
+//}
diff --git a/ws2812_bl_ctrl/ws2812-pio-rs b/ws2812_bl_ctrl/ws2812-pio-rs
new file mode 160000
index 0000000..37ade6d
--- /dev/null
+++ b/ws2812_bl_ctrl/ws2812-pio-rs
@@ -0,0 +1 @@
+Subproject commit 37ade6dd937c62c2b9c0b0fe212c291fe5f33317