Hi Onioneer,

We used Omega 2S+ in a battery powered device. So it have trouble in meeting some compliance in North America. We need to bring the power consumption down. I have switched off WiFi and other periphery I can find. It still consume around 260mA (RMS). Is there anybody find a way to reduce the power consumption more or let the module enter into sleep mode? Thanks!

cheers
Fan

After I install java-wrappers, it is good now. Thanks all!
sudo apt-get install java-wrappers

Hi cas,
Thanks for your replay. I checked the configure log.

configure:24169: $? = 0
configure:24194: result: stdint.h (shortcircuit)
configure:24579: result: make use of stdint.h in include/config-int.h (assuming C99 compatible system)
configure:24629: checking for cacao
configure:24659: result: no
configure:24629: checking for jamvm
configure:24659: result: no
configure:24629: checking for kaffe
configure:24659: result: no
configure:24629: checking for gij
configure:24659: result: no
configure:24629: checking for java
configure:24645: found /usr/bin/java
configure:24656: result: java
configure:24723: checking for ecj
configure:24739: found /usr/bin/ecj
configure:24750: result: ecj -warn:-deprecation,serial,unusedImport
configure:24807: checking if ecj -warn:-deprecation,serial,unusedImport is a version of gcj
configure:24821: result: no
configure:24836: checking if ecj -warn:-deprecation,serial,unusedImport works
configure:24861: ecj -warn:-deprecation,serial,unusedImport -source 1.5 -target 1.5 Object.java
/usr/bin/ecj: 4: .: Can't open /usr/lib/java-wrappers/java-wrappers.sh
configure:24864: $? = 2
configure:24868: error: The Java compiler ecj -warn:-deprecation,serial,unusedImport failed (see config.log, check the CLASSPATH?)

Hi all,
I followed the instructions described on documents to set up my building system . However when I compile with make -j1 V=s. I came across errors as below. I checked it on line and could not find a solution to it.

checking for gij... no
checking for java... java
checking for ecj... ecj -warn:-deprecation,serial,unusedImport
checking if ecj -warn:-deprecation,serial,unusedImport is a version of gcj... no
checking if ecj -warn:-deprecation,serial,unusedImport works... configure: error: The Java compiler ecj -warn:-deprecation,serial,unusedImport failed (see config.log, check the CLASSPATH?)
Makefile:89: recipe for target '/home/fan/omega2/build_dir/target-mipsel_24kc_musl-1.1.16/classpath-0.99/.configured_yyyynnnn' failed
make[3]: *** [/home/fan/omega2/build_dir/target-mipsel_24kc_musl-1.1.16/classpath-0.99/.configured_yyyynnnn] Error 1
make[3]: Leaving directory '/home/fan/omega2/feeds/packages/libs/classpath'
package/Makefile:105: recipe for target 'package/feeds/packages/classpath/compile' failed
make[2]: *** [package/feeds/packages/classpath/compile] Error 2
make[2]: Leaving directory '/home/fan/omega2'
package/Makefile:101: recipe for target '/home/fan/omega2/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.package_compile' failed
make[1]: *** [/home/fan/omega2/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/fan/omega2'
/home/fan/omega2/include/toplevel.mk:198: recipe for target 'world' failed
make: *** [world] Error 2

I am using virtual box with Ubuntu 18.04.1 LTS.
Thanks!

Hi all,
I followed the instructions described on documents to set up my building system . However when I compile with make -j1 V=s. I came across errors as below. I checked it on line and could not find a solution to it.
checking for gij... no
checking for java... java
checking for ecj... ecj -warn:-deprecation,serial,unusedImport
checking if ecj -warn:-deprecation,serial,unusedImport is a version of gcj... no
checking if ecj -warn:-deprecation,serial,unusedImport works... configure: error: The Java compiler ecj -warn:-deprecation,serial,unusedImport failed (see config.log, check the CLASSPATH?)
Makefile:89: recipe for target '/home/fan/omega2/build_dir/target-mipsel_24kc_musl-1.1.16/classpath-0.99/.configured_yyyynnnn' failed
make[3]: *** [/home/fan/omega2/build_dir/target-mipsel_24kc_musl-1.1.16/classpath-0.99/.configured_yyyynnnn] Error 1
make[3]: Leaving directory '/home/fan/omega2/feeds/packages/libs/classpath'
package/Makefile:105: recipe for target 'package/feeds/packages/classpath/compile' failed
make[2]: *** [package/feeds/packages/classpath/compile] Error 2
make[2]: Leaving directory '/home/fan/omega2'
package/Makefile:101: recipe for target '/home/fan/omega2/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.package_compile' failed
make[1]: *** [/home/fan/omega2/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/fan/omega2'
/home/fan/omega2/include/toplevel.mk:198: recipe for target 'world' failed
make: *** [world] Error 2

I am using virtual box with Ubuntu 18.04.1 LTS.
Thanks!

We want to pass certification but it needs RF of WIFI under control. Do you have instruction on how to do it? Thanks!